Andres, J., Górniewicz, L. and Jezierski, J. (2000) “Relative versions of the multivalued Lefschetz and Nielsen theorems and their application to admissible semi-flows”, Topological Methods in Nonlinear Analysis, 16(1), pp. 73–92. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.2000.031 (Accessed: 22 July 2024).