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Sayre, Geneva (1977). "Authors of Names of Bryophytes and the Present Location of Their Herbaria". The Bryologist. 80 (3): 502–521. doi:10.2307/3242025. JSTOR3242025.
Stafleu, Frans A. (1972). "The Volumes on Cryptogams of "Engler und Prantl"". Taxon. 21 (4): 501–511. doi:10.2307/1219117. JSTOR1219117.
Sayre, Geneva (1977). "Authors of Names of Bryophytes and the Present Location of Their Herbaria". The Bryologist. 80 (3): 502–521. doi:10.2307/3242025. JSTOR3242025.
Koponen, Timo (1 September 2005). "INVITED REVIEW: Viktor Ferdinand Brotherus (1849–1929) and Musci in Engler & Prantl's Die Natürlichen Planzenfamilien". The Bryologist. 108 (3): 345–362. doi:10.1639/0007-2745(2005)108[0345:vfbami]2.0.co;2. ISSN0007-2745.