%0 Journal Article %A Martínez Sánchez, Jaime %A Baltazar-Larios, Fernando %T Approximations of the ultimate ruin probability in the classical risk model using the Banach's fixed-point theorem and the continuity of the ruin probability %J Kybernetika %D 2022 %P 254-276 %V 58 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14736/kyb-2022-2-0254/ %R 10.14736/kyb-2022-2-0254 %G en %F 10_14736_kyb_2022_2_0254