Andres, J., Malaguti, L. and Pavlačková, M. (2011) “On second-order boundary value problems in Banach spaces: a bound sets approach”, Topological Methods in Nonlinear Analysis, 37(2), pp. 303–341. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.2011.016 (Accessed: 25 April 2024).