For citations:
Bolshakova M.A., Stoupakova A.V., Sautkin R.S., Sitar K.A., Kalmykov A.G., Krasnova E.A., Pronina N.V., Vaytekhovich A.P. On the Oil and Gas Source Rocks Classification. Georesursy = Georesources. 2025;27(2):54–63. (In Russ.) https://doi.org/10.18599/grs.2025.2.5