SOKIL, B. I.; KHYTRIAK, O. I. Inverse problems of dynamics for nonlinear systems, the motion described by quasi-linear hyperbolic equations. Military Technical Collection, [S. l.], n. 4, p. 78–81, 2011. DOI: 10.33577/2312-4458.4.2011.78-81. Disponível em: http://vtz.asv.gov.ua/article/view/174005. Acesso em: 9 mar. 2022.