SuvorovS. G. (2001) “Coleman Principles and Krasnosel’skii Genus in Eigenfunction Problems”, Ukrains’kyi Matematychnyi Zhurnal, 53(7), pp. 983-992. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4318 (Accessed: 24November2024).