1 literature reference for Echinoderma asperum (Pers.) Bon 1991:

Author: Bon, M.
Year: 1991
Title: Les genres Echinoderma (Locq. ex Bon) st. nov. et Rugosomyces Raithelhuber ss. lato
Source: In: Docums Mycol., mém. hors sér. 21(no. 82):61–66