@book{11947,
	author = {Rickman, Seppo},
	title = {Quasiregular mappings},
	publisher = {Springer-Verlag},
	year = {1993},
	address = {Berlin},
	note = {Ergehnisse der Mathematik und ihrer Grezgebiete. 3. Folge Band 26. A series of modern surveys in Mathematics}
}