Bilateral Inequalities and Implicit Unilateral Systems of the Non-Variational Type. M.G. Garroni; M.A. Vivaldi Manuscripta mathematica
Bilateral Evolution Problems of Non-Variational Type: Existence, Uniqueness, Hölder-Regularity and Approximation of Solutions. M.A. Vivaldi; Maria G. Garroni — 1984 Manuscripta mathematica