1. Benjamin R K 1979 Zygomycetes and their spores. In The Whole Fungus Vol 2. Ed. B Kendrick. pp 573–622. National Museum of Natural Sciences and National Museum of Canada, Ottawa.
2. Benny G L. Humber R A and Morton J B 2001 Zygomycota: Zygomycetes. In The Mycota VII part A. Eds. McLaughlin, Mc Laughlin. Lemke. pp 113–146. Springer, Berlin. Heidelberg.
3. Cavalier-Smith T 1998 A revised six-kingdom system of life. Biol. Rev. 73, 203–266.
4. Ciferri R and Tomaselli R (1957) Prospetto di une sistematica microlichenologica. ATTI Series 5, Vol. XIV (1–3), pp 247262. Istituto Botanico della Universitü Laboratorio Crittogamico Pavia, Pavia.
5. Drude O and Schorler B 1916 Beiträge zur Flora Saxonica — III. Uber eine merkwürdige Alge Sachsens IGeosiphon pvrifnnnis (Ktz.) F. v. Wettst.j. Sitzungsberichte und Abhandlungen der Naturwissenschaftlichen Gesellschaft ISIS e.V., Dresden. pp 58–61.