[1]
S. P. Lavrenyuk and B. I. Ptashnik, “On certain nonlinear pseudoparabolic variational inequalities without initial conditions”,
Ukr. Mat. Zhurn., vol. 51, no. 3, pp. 328–337, Mar. 1999, Accessed: Apr. 07, 2025. [Online]. Available:
https://umj.imath.kiev.ua/index.php/umj/article/view/4616