Stepanyan, A.S. “HISTORY TO THE STUDY OF ECTOMYCORRHIZAL FUNGI OF ARMENIA (FAMILY RUSSULACEAE)”. Proceedings of the YSU B: Chemical and Biological Sciences, vol. 52, no. 2 (246), July 2018, pp. 101-4, doi:10.46991/PYSU:B/2019.52.2.101.