PETLIUK, I. V.; SHEVCHENKO, T. H.; PETLIUK, O. I. The use of coefficient of vertical refraction in modern electronic devices. Military Technical Collection, [S. l.], n. 6, p. 165–168, 2012. DOI: 10.33577/2312-4458.6.2012.165-168. Disponível em: http://vtz.asv.gov.ua/article/view/166810. Acesso em: 9 mar. 2022.