Lücking, Robert; Hawksworth, David L. (2007). "Names for lichen-forming fungi introduced by Ciferri and Tomaselli are illegitimate and not available for use, except for three cases". Taxon. 56 (4): 1274–1284. doi:10.2307/25065921.
escholarship.org
Gentile, S. (1982). "Ruggero Tomaselli". Biogeographia (in Italian). 9: 711–717.