@misc{10_21136_CPM_1986_108159, title = {Zpr\'avy}, journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky}, pages = {316--318}, year = {1986}, volume = {111}, number = {3}, doi = {10.21136/CPM.1986.108159}, language = {cs}, url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1986.108159/} }