@book{701663, title = {Proceedings of the 20th Winter School "Geometry and Physics"}, series = {GDML\_Books}, publisher = {Circolo Matematico di Palermo}, address = {Palermo}, year = {2001}, mrnumber = {MR1826770}, zbl = {0961.00020}, url = {http://dml.mathdoc.fr/item/701663} }
Slovák, Jan; Čadek, Martin (éd.). Proceedings of the 20th Winter School "Geometry and Physics". GDML_Books (2001), http://gdmltest.u-ga.fr/item/701663/