@book{701475, title = {Proceedings of the Winter School "Geometry and Physics"}, series = {GDML\_Books}, publisher = {Circolo Matematico di Palermo}, address = {Palermo}, year = {1991}, mrnumber = {MR1061784}, zbl = {0742.00067}, url = {http://dml.mathdoc.fr/item/701475} }
Bureš, J.; Souček, V. (éd.). Proceedings of the Winter School "Geometry and Physics". GDML_Books (1991), http://gdmltest.u-ga.fr/item/701475/