Alekseev В. А., Besogonov В. В., Skvortsova И. Н., Abo Issa Н., and Moussa И. “Glass Ceramics Surface Topology Investigation by the Atomic Force Microscopy in a Tapping Mode”. Intellekt. Sist. Proizv., vol. 6, no. 1, Mar. 2011, pp. 172-7, https://izdat.istu.ru/index.php/ISM/article/view/1787.