Citation: Synecek, V.; Hybler, J. (1974). The crystal structures of krupkaite, CuPbBi3S6, and of gladite, CuPbBi5S9, and the classification of superstructures in the bismuthinite-aikinite group,. Neues Jahrbuch fur Mineralogie, Monatshefte, 1974, pp. 541-560.