Template:Birina, 1948
- Birina, L.M. 1948. Novyye vidy izvestkovykh vodorosley i foraminifer pogranichnykh sloyev devona i karbona [New species of calcareous algae and foraminifera of the Devonian and Carboniferous boundary layers]. Sovetskaya Geologiya 28: 154–159. [in Russian]