Citation: Piilonen, P. C.; McDonald, A. M.; LaLonde, A. E. (2001). Kupletskite polytypes from the Lovozero massif, Kola Peninsula, Russia: Kupletskite-1A and kupletskite-Ma2b2c Sample: Kupletskite-Ma2b2c. European Journal of Mineralogy, 13, pp. 973-984.