168
| Yakovlev, N. N., 1928, Deux nouveaux genres de crinoids (Poteriocrinidae) du Paleozoique superieur du pays de la petschora: Leningrad Museum of Geology, Trav., no. 3, p. 5.
|
169
| Yakovlev, N. N., 1933, Deux crinoides de permien superieur de la Transcaucasie: Academy Sciences USSR Bulletin (Academy Nauka USSR Doklady), v. 7, p. 975 978.
|
170
| Yakovlev, N. N., 1934, Crinoidi permiani di Sicilia: Paleontolographica Italica, v. 34, (1933)k, new series, v. 4, p. 269 – 283.
|
171
| Yakovlev, N. N., 1938, Crinoidi permiani di Sicilia: Paleontolographica Italica, v. 38, p. 249.
|
172
| Yakovlev, N. N., and Ivanov, A. P., 1956, Morskie lilii I blastoidei kamennougo lnykh I permskikh otlozhenii SSSR (Crinoids and blastoids of the Carboniferous and Permian deposits of Russia): Vses. Nauchno-Issled. Geological Institute Trudy, 142 p.
|