Citation: Kassner, D.; Baur, W. H.; Joswig, W.; Eichhorn, K.; Wendschuh-Josties, M.; Kupcik, V. (1993). A test of the importance of weak reflections in resolving a space-group ambiguity involving the presence or absence of an inversion centre. Acta Crystallographica Section B, 49, pp. 646-654.