Chudinovich, I. (1995). The solvability of the second main mixed problem of the theory of elasticity in a complete scale of Sobolev spaces. Математическая физика, анализ, геометрия, 2(3-4), 356–362. вилучено із https://mag.ilt.kharkiv.ua/index.php/mag/article/view/m02-0356e