Zijlstra, G. (2001). (1494) Proposal to Conserve the Name Sigillaria Brongn. 1822 (Fossil, Lycopsida, Sigillariaceae) against Sigillaria Raf. 1819 (Liliaceae) and Rhytidolepis Sternb. 1821 (Fossil, Lycopsida, Sigillariaceae). Taxon. 50(3): 937-938.
(1494) Proposal to Conserve the Name Sigillaria Brongn. 1822 (Fossil, Lycopsida, Sigillariaceae) against Sigillaria Raf. 1819 (Liliaceae) and Rhytidolepis Sternb. 1821 (Fossil, Lycopsida, Sigillariaceae)