S. G. Nanagulyan and A. L. Sirunyan, “THE SPECIES OF EDIBLE MUSHROOMS OF «SEVAN» NATIONAL PARK WITH BUFFER ZONE AND PECULIARITIES OF THEIR DEVELOPMENT”, Proc. YSU B: Chem. Biol. Sci., vol. 39, no. 2 (207), pp. 111–115, Jun. 2005.