Gallo А., A. M. Piccirillo, and L. Toscano, “On Some Noncoercive Variational Inequalities”, Ukr. Mat. Zhurn., vol. 53, no. 6, pp. 723–741, Jun. 2001, Accessed: Apr. 23, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4296