The degree of infestation of the plum tree and of the sweet cherry tree by wood - destroying basidiomycetes and frost - plates on the plum tree and on the sweet cherry tree in different areas of Moravia and Silesia - Špaček, Jan, 1927-2021 (Folia Facultatis scientiarum naturalium Universitatis Masarykianae Brunensis. Biologia ;, 1992)