HYBLER, J., SEJKORA, J., VENCLIK, V. Polytypism of cronstedtite from Pohled, Czech Republic. European Journal of Mineralogy. 2016, 28(4), 765-775. ISSN 0935-1221. E-ISSN 1617-4011. Dostupné z: https://doi.org/10.1127/ejm/2016/0028-2532