@book{11150,
	author = {Ervan, Joachim and Falkowski, Bernd-Jurgen and Falkowski, Bernd-Jurgen; jt. auth.},
	title = {Low order cohomology and applications},
	publisher = {Springer-Verlag},
	year = {1981},
	series = {Lecture notes in Mathematics},
	address = {Berlin}
}