@book{8444,
	author = {Trotha, Hartmut Von ; auth.},
	title = {Dissertationes mathematicae; Rozprawy matematyczne},
	publisher = {Penstwowe Wydawincto Naukowe},
	year = {1980, 1981},
	series = {Polske Akademia Nauk Institut Matematyozny},
	address = {Warszawa}
}