Poretzky, V.S. (1924) Diatomovyye solenykh i solonovatykh vodoyemov g. Solikamska, Permskoy gub. [Diatoms of salt and brackish water bodies of Solikamsk, Perm province]. Trudy Leningradskago Obschchestva Estestvoispytatelei 53(3): 108-148, 13 figures. [in Russian with German abstract]