• Andrews, S., & Redfearn, P. L. (1965). Observations on the germination of the gemmae of Hyophila tortula (Schwagr.) Hampe. The Bryologist 68, 345347.
  • Chopra, R. N., & Rawat, M. S. (1973). In vitro production of secondary gemmae on the protonema of Bryum klinggraeffii Schimp. The Bryologist 76, 183185.
  • Chopra, R. N., & Rawat, M. S. (1977). Studies on production and behaviour of protonemal gemmae in some Bryaceae. The Bryologist 80, 655661.
  • Correns, C. (1899). Untersuchungen über die Vermehrung der Laubmoose durch Brutorgane und Stecklinge. Verlag Gustav Fisher, Jena .
  • Dhingra, Sadhana, & Chopra, R. N. (1983). Protonemal gemmae in the moss Trematodon brevicalyx Dixon. Journal of Bryology, 12, (In press.).
  • Edwards, S. R. (1978). Protonemal gemmae in Schistostega pennata (Hedw.) Web. et Mohr. Journal of Bryology 10, 6972.
  • Goebel, K. (1899). Organography of Plants. Part II. Hafner Publishing Company, London .
  • Kumra, P. K. (1981). Morphogenetic and physiological studies on some mosses, Ph.D. Thesis, University of Delhi, Delhi , India .
  • Maheu, J. (1908). Production expérimentale de propagules dans le genre Barbula. Bulletin de la Société Botanique de France, 55, 445453.
  • Nitsch, J. P., & Nitsch, C. (1956). Auxin dependent growth of excised Helianthus tuberosus tissues. American Journal of Botany 43, 839851.
  • Pringsheim, E. G. (1921). Physiologische Studien an Moosen. I. Die Reinkulturen von Leptobryum pyriforme (L.) Schpr. Jahrbuch für Wissenschaftliche Botanik 60, 499530.
  • Saito, K. (1972). Gemmae formation on rhizoids of Eucladium verticillatum. Miscellanea Bryologica et Lichénologica, 6, 4142.
  • Schofield, W. B. (1981). Ecological significance of morphological characters in the moss gametophore. The Bryologist 84, 149165.
  • Selkirk, P. M. (1981). Protonemal gemmae on Amblystegium serpens (Hedw.) B. S., & G. from Macquarie Island. Journal of Bryology 11, 719721.
  • Watson, E. V. (1971). The Structure and Life of Bryophytes. Hutchinson University Library, London .
  • Whitehouse, H. L. K. (1961). The occurrence of Tortula stanfordensis in Cornwell, new to Europe. Transactions of British Bryological Society 4, 8494.
  • Whitehouse, H. L. K. (1963). Bryum riparium Hagen in British Isles. Transactions of British Bryological Society 4, 389403.
  • Whitehouse, H. L. K. (1980). The production of protonemal gemmae by mosses growing in deep shade. Journal of Bryology 11, 133138.