Худик, Владимир Дмитриевич, Юрий Дмитриевич Захаров, Владимир Тимофеевич Съедин, and Ирина Борисовна Цой. 2019. “Oligocene Bivalves Faunae of the Kholmsk Formation in the South-West Sakhalin and Their Environments”. Vestnik of the Far East Branch of the Russian Academy of Sciences, no. 2 (May):71-80. http://vestnikdvo.ru/index.php/vestnikdvo/article/view/191.