On Singularities at the boundary points and uniqueness theorems of the first boundary value problem of elasticity
O A Oleĭnik, G.A. Oleinik · Communications in Partial Differential Equations · 1977
(1977). On Singularities at the boundary points and uniqueness theorems of the first boundary value problem of elasticity. Communications in Partial Differential Equations: Vol. 2, No. 9, pp. 937-969.