Reference

E. I. Dem'yanova, V. A. Ponomarev (1979): On the anthecology of some steppous plants in the forest-steppe of the Transural region; [Ru; 9 figs., 22 refs. Date: 8.VIII.1979]. – In: BARANNIKOVA, V. A. (editor-in-chief). Pollination Ecology. An Inter-College Collection of Papers. [No. 4]. Perm (Perm State University) – : 113 - 125.