1. Ammar, A., Jeribi, A., Lazrag, N.: Sequence of linear operators in non-Archimedean banach spaces. Mediterr. J. Math. 16, 130 (2019). https://doi.org/10.1007/s00009-019-1385-z
2. Ammar, A., Jeribi, A., Lazrag, N.: Sequence of multivalued linear operators converging in the generalized sense. Bull. Iranian Math. Soc. 46(6), 1697–1729 (2020)
3. Diagana, T.: Non-archimedean linear operators and applications, Nova Science Publishers, Inc., Huntington, NY, xiv+92 pp. ISBN: 978-1-60021-405-9, 1-60021-405-3 (2007)
4. Diagana, T., Ramaroson, F.: Non-archimedean operator theory. Springer Briefs in Mathematics. Springer, Cham, xiii+156 pp. ISBN: 978-3-319-27322-8, 978-3-319-27323-5 (2016)
5. Diarra, B.: An operator on some ultrametric Hilbert spaces. J. Anal. 6, 55–74 (1998)