@misc{CMUC_1985__26_1_a0,
     title = {Preface},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {1--2},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {1985},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1985__26_1_a0/}
}