$a Middle Proterozoic (1.5 Ga) Horodyska moniliformis Yochelson and Fedonkin, the oldest known tissue-grade colonial eucaryote / Mikhail A. Fedonkin and Ellis L Yochelson. - Washington, D. C., 2002. $b (Paleonological Institute, Russian Academy of Sciences, Moscow).
670
$a DISA online. $b (Fedonkin, Michail Aleksandrovič).
670
$a LOCIS online. $b (Fedonkin, M. A. (Mikhail Aleksandrovich)