HERINK J. (1973): Dr. Petr Fragner quinquagenarius. Česká Mykologie 27(4): 241-247 [published: 1973]
FRÁGNER P. (1957): Varietas alba Rhodotorulae mucilaginisae (Jörg.) Harrison. Česká Mykologie 11(4): 211-214 [published: 20th October, 1957]