Babahmed, M., and Azzedine El asri. “Invariant Subspace Problem and Compact Operators on Non-Archimedean Banach Spaces”. Extracta Mathematicae 35, no. 2 (December 1, 2020): 205-219. Accessed January 18, 2022. https://publicaciones.unex.es/index.php/EM/article/view/2605-5686.35.2.205.