@misc{AMUC_1982__40-41_185834,
     title = {[unknown]},
     journal = {Acta mathematica Universitatis Comenianae},
     pages = {301--307},
     publisher = {mathdoc},
     volume = {40-41},
     year = {1982},
     url = {http://geodesic.mathdoc.fr/item/AMUC_1982__40-41_185834/}
}