SINGER R., KUTHAN J. (1980): Comparison of some lignicolous white-spored American agarics with European species. Česká Mykologie 34(2): 57-73 (published: 15th April, 1980)
SINGER R., KUTHAN J. (1976): Notes on Boletes. Česká Mykologie 30(3-4): 143-155 (published: 1976)
SINGER R., KUTHAN J. (1976): Notes on Chroogomphus (Gomphidiaceae). Česká Mykologie 30(2): 81-89 (published: 1976)
DERMEK A., KUTHAN J., SINGER R. (1976): An interesting subspecies of Boletus erythropus (Fr. ex Fr.) Krombh. (With colored plate No. 89). Česká Mykologie 30(1): 1-2 (published: 1st February, 1976)