Вовк, О.О., А.Є. Гай, and О.В. Рябчевський. “Classification Methods for Ground Deformation”. Proceedings of National Aviation University (archive) 33, no. 3-4 (March 1, 2007): 151–158. Accessed June 14, 2026. http://jrnl.kai.edu.ua/index.php/visnik/article/view/1515.