Mureşan, A. S. (1980). On the uniqueness of the solution of Dirichlet’s problem relative to a strong elliptic system of second order partial differential equations. Anal. Numér. Théor. Approx., 9(2), 245–250. Retrieved from https://ictp.acad.ro/jnaat/journal/article/view/1980-vol9-no2-art9