- Lower Silesian Voivodeship
| Grochowina, A., Gołębiowska, B., & Pieczka, A. (2012). Graftonite-sarcopside intergrowths in phosphate nodulas from pegmatite at Michałkowa, Sowie Mountains Block, SW Poland. Geology, Geophysics and Environment, 38(4), 477-478. Łodziński M. & Sitarz M. 2008: Chemical and Spectroscopic Characterization of Some Phosphates Accessory Minerals from Pegmatites of the Sowie Mts (Owles Mts), SW Poland. EUCMOS, Spectroscopy Applied to Archaeology, Arts, Geology and Mineralogy, p. 278 |