@misc{AMUC_1983__42-43_185866,
     title = {[unknown]},
     journal = {Acta mathematica Universitatis Comenianae},
     pages = {293--306},
     publisher = {mathdoc},
     volume = {42-43},
     year = {1983},
     url = {http://geodesic.mathdoc.fr/item/AMUC_1983__42-43_185866/}
}