Bader, R., M. I. Kamenskiĭ, and V. Obukhovskiĭ. “On Some Classes of Operator Inclusions With Lower Semicontinuous Nonlinearities”. Topological Methods in Nonlinear Analysis, vol. 17, no. 1, Mar. 2001, pp. 143-56, https://apcz.umk.pl/TMNA/article/view/TMNA.2001.010.