Barreira, L. and Valls, C. (2013) “Analytic robustness of parameter-dependent perturbations of difference equations”, Topological Methods in Nonlinear Analysis, 41(2), pp. 335–364. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.2013.016 (Accessed: 24 April 2024).