1. Abramova, A., i I. Abramov: Botanićeski materiali 13, 294–303 (1960)
2. (2) Botanićeski materiali 13, 305–312 (1960).
3. Abramova, A., L. Savicz-Ljubitzkaja i S. Smirnova: Opredelitelj listostebjelnich mchow arktiki SSSR. Moskau-Leningrad 1961.
4. Al Aish, M., and L. Anderson: (1) J. E. Mitchell Soc. 76, 113–120 (1960);
5. (2) Bryologist 63, 17–25 (1961)