2023-06-302006-10-312023-06-301987http://nbn-resolving.de/urn:nbn:de:hebis:26-opus-37284https://jlupub.ub.uni-giessen.de/handle/jlupub/17853http://dx.doi.org/10.22029/jlupub-17221deIn Copyrightddc:010