1. Бека, К., И. Высоцкий. 1976. Геология нефти и газа. Москва, Недра, 592 стр.
2. Деков, Д., В. Василев, Е. Колев, Б. Маринов, Ц. Цанов.1985. Хидрогеохимична зоналност на палеоген-неогенския водоносен комплекс в Присакарската част на Източномаришкия басейн. Сп. БГД, год. XLVI, кн. 1, 92-102.
3. Йорданов, Й. 2024. “Белият водород“- новата парадигма на приложната геология. Минно дело и геология, 9/2024, 31-41.
4. Кудрявцев, Н. А. 1951. Против органической гипотезы происхождения нефти. Нефтяное хозяйство. 1951. № 9, 3-8.
5. Менделеев, Д. И. 1877. Происхождение нефти. Журнал Русского химического общества и физического общества. Вып. 2. Часть химическая, отдел 1, 36-37.
6. Петров, П., Св. Мартинов, К. Лимонадов, Ю.Страка.1970.Хидрогеоложки проучвания на минералните води в България. Техника, София, 195 стр.
7. Тодоров, А., Б. Маринов, Л. Кузманов, Е. Колев, Б. Цачев, П. Недялков.1985. Ролята на тектонските фактори за формирането на хидрогеоложките условия в Симитлийския грабен. Сп. БГД, год. XLVI, кн. 3, 346-360.
8. Чекалюк, Э. Б. 1971.Термодинамические основы теории минерального происхождения нефти. АН УССР. Институт геологии и геохимии горючих ископаемых. Киев, Наукова думка, 256 стр.
9. Шестопалов, В. М. 2020. О геологическом водороде. Геофизический журнал № 6, Т. 42, 2020. 3-35.
10. Ballentine, Ch. J., R. Karolytė, A. Cheng, B. Sh. Lollar, J. G. Gluyas, M. C. Daly. 2025.
11. Natural hydrogen resource accumulation in the continental crust. Nature Reviews Earth & Environment, vol. 6, May 2025, 342–356.
12. Barenbaum, А. А. 2018. On the relationship of oil and gas formation and degassing processes with groundwater decomposition. Geores., vol. 20, Is. 4. part 1, 290-300.
13. Etiope, G. 2017. Abiotic methane in continental serpentinization sites: an overview. Procedia Earth and Planetary Science 17(2017), 9-12.
14. Etiope, G., B. Sh. Lollar. 2013. Abiotic methane on Earth, Rev. Geophys., 51, 276–299, DOI :10.1002/rog.20011.
15. Etiope, G., E. Ifandi, M. Nazzari, M. Procesi, B. Tsikouras, G. Ventura, A. Steele, R. Tardini, P. Szatmari. 2018. Widespread abiotic methane in chromitites Scientific REPOrTS,2018),1-11.
16. Glasby, G. P. 2006. Abiogenic Origin of Hydrocarbons: An Historical Overview. Res. Geology, vol. 56, 1, 83–96.
17. Gold, T. 1993. The origin of methane in the crust of the Earth. U.S. Geol. Surv. Prof. Paper, 1570, 57–80.
18. Höök, H., U. Bardi, L. Feng, X. Pang. 2010. Development of oil formation theories and their importance for peak oil. Marine and Petroleum Geology, vol. 27, Issue 9, October 2010, 1995-2004.
19. Hunt, J. M. 1995. Petroleum geochemistry and geology. New Jork, 743 pp.
20. Keir, R. S. 2010. A note on the fluxes of abiogenic methane and hydrogen from mid-ocean ridges. Geophysical research letters, vol. 37, L24609, DOI :10.1029/2010GL045362, 1-5.
21. Konn, C., J. L. Charlou, N. G. Holm, O. Mousis. 2015. The Production of Methane, Hydrogen, and Organic Compounds in Ultramafic-Hosted Hydrothermal Vents of the Mid-Atlantic Ridge. Astrobiology, vol. 15, 5, DOI: 10.1089/ast. 2014.1198, 381-402.
22. Lee, S. 2025. Methanogenesis: The Microbial Process Understanding the Biochemistry and Ecology of Methane Production. June 9, 2025. https://www.numberanalytics.com/blog /methanogenesis-microbial-process-advanced-microbiology.
23. Li, J., Liu, Q., Jiang, W., Li, Y., Shuai, Y., & Xiong, Y. (2025). Tracing the contribution of abiotic methane in deep natural gases from the songliao basin, china using bulk isotopes and methane clumped isotopologue 12CH2d2. Geochemistry, Geophysics, Geosystems, 26, e2024GC011705. https://doi.org/10. 1029/2024GC011705.1-23.
24. Marques, J. M., G. Etiope, M. O. Neves, P. M. Carreira,C.Rocha, S. D. Vance, L. Christensen, A. Z. Miller, S. Suzuki. 2018. Linking serpentinization, hyperalkaline mineral waters and abiotic methane production in continental peridotites: an integrated hydrogeological-bio geochemical model from the Cabeço de Vide CH4-rich aquifer (Portugal).,1-29. https://www.sciencedirect.com/science/article/pii/S0883292718301987.
25. Merdith, A. S., P. García del Real, I. Daniel, M. Andreani, N. M. Wright, N. Coltice. 2019. Pulsated Global Hydrogen and Methane Flux at Mid-Ocean Ridges Driven by Pangea Breakup. Geochemistry, Geophysics, Geosystems. Researche article, 1-20. DOI:10.1029/2019GC008869.
26. Milkov, A. 2022. Molecular hydrogen in surface and subsurface natural gases: Abundance, origins and ideas for deliberate exploration. Earth-Science Reviews Vol. 230, July 2022.
27. Porfirev, V. B. 1974. Inorganic Origin of Petroleum. The American Association of Petroleum Geologists Bull., vol. 58, No.1, 3-33.
28. Proskurowski, G., M. D. Lilley, J. S. Seewald, G. L. Früh-Green, E. J. Olson, J. E. Lupton, S. P. Sylva, D. S. Kelley. 2008. Abiogenic Hydrocarbon Production at Lost City Hydrothermal Field. Science, Febr., vol. 319, 604-607.
29. Sephton, M. A., R. M. Hazen. 2013. On the Origins of Deep Hydrocarbons. Reviews in Mineralogy & Geochemistry,
vol. 75,№1, pp 449-465.
30. Tian, Q-n., Shu-qing Yao, M. Shao, W. Zhang, H. Wang. 2022. Origin discovery exploration and development status and prospect of global natural hydrogen under the background of “carbon” neutrality”. China geology 5 (2022), 722-733.
31. Velichkova, P., G. Meracheva, N. Hristov, Sv. Bratkova, Ef. Zaneva-Dobranova. 2023. Study of opportunities for assessment of tightness of fault systems in Northwest Bulgaria through a combination of gas chromatography and molecular-genetic methods. Ecologia Balkanica, Dec. 2023, vol.15,2, pp 47-57.
32. Wang, Lu., Zh. Jin, X. Chen, Y. Su, X. Huang. 2023. The Origin and Occurrence of Natural Hydrogen. Energies 2023, 16, 2400. https://doi.org/10.3390/en16052400.
33. Wogan, N., J. Krissansen-Totton, D. C. Catling. 2020. Abundant Atmospheric Methane from Volcanism on Terrestrial Planets Is Unlikely and Strengthens the Case for Methane as a Biosignature. The Planetary Science Journal, 1,58, 1-17.
34. X. Xia, X., Y. Gao. 2021. Validity of Geochemical Signatures of Abiotic Hydrocarbon Gases on Earth. Journal of the Geological Society, 1-58. https://www.lyellcollection.org/doi/abs/10.1144/jgs2021-077.
35. Zgonnik, V. 2020. The occurrence and geoscience of natural hydrogen: A comprehensive review. Earth-Science Reviews 203 (2020) 103140, 1-51.