Zhang, C. J., Cho, Y. J. and Wei, S. M. (1998) “Variational inequalities and surjectivity for set-valued monotone mappings”, Topological Methods in Nonlinear Analysis, 12(1), pp. 169–178. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.1998.035 (Accessed: 28 March 2024).