J. Motyka, J. Oknińska, and M. Manecki, “Synthesis and mineralogical characteristics of hydroxylapatite-hydroxylpyromorphite solid solution series Ca5(PO4)3OH – Pb5(PO4)3OH”, geol, vol. 41, no. 1, p. 112, Aug. 2015, doi: 10.7494/geol.2015.41.1.112.