@book{UBHD-3499180, publisher={Norwegian Univ. Pr.}, address={Oslo}, year={1987}, pages={288 S.}, language={eng}, isbn={82-00-02580-2 and 82-00-02597-7 and 978-82-00-02597-9 and 978-82-00-02580-1}, library={UB [Signatur: 88 B 1030::1] ; UB}, }