@misc{AMUC_1985__46-47_185921,
     title = {[unknown]},
     journal = {Acta mathematica Universitatis Comenianae},
     pages = {237--242},
     year = {1985},
     volume = {46-47},
     url = {http://geodesic.mathdoc.fr/item/AMUC_1985__46-47_185921/}
}