@book{701428, title = {Proceedings of the Winter School "Geometry and Physics"}, series = {GDML\_Books}, publisher = {Circolo Matematico di Palermo}, address = {Palermo}, year = {1989}, mrnumber = {MR1009562}, zbl = {0672.00006}, url = {http://dml.mathdoc.fr/item/701428} }
Bureš, J.; Souček, V. (éd.). Proceedings of the Winter School "Geometry and Physics". GDML_Books (1989), http://gdmltest.u-ga.fr/item/701428/