For citations:

Kulagina E.I., Bashlykova E.Yu. Foraminiferal marker taxa and their correlation potential for definition of the lower Serpukhovian boundary in the Urals. LITHOSPHERE (Russia). 2020;20(3):328-340. (In Russ.) https://doi.org/10.24930/1681-9004-2020-20-3-328-340