@book{8661,
	author = {Symposium on the Current State and Prospects of Mathematics, Institut d'Estudis Catalans, Barcelona, June 13-18, 1991 and Berta, C. Casacu ; ed.},
	title = {Mathematical research today and tomorrow; viewpoints of seven fields medalists},
	publisher = {Springer-Verlag},
	year = {1992},
	address = {Berlin}
}