N. Dmitruk, N. Berezovska, I. Dmitruk, V. Serdyuk, J. Sabataityte, and I. Simkiene, “Modification of Optical Properties of Porous AIIIBV Layers Produced by Anodic Etching”, Ukr. J. Phys., vol. 57, no. 2, p. 145, Feb. 2012.