2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/52235A simple, but effcient way of calculating regularized Casimir energies suitable for non-trivial frequency spectra is briefly described and applied to the case of a kappa-deformed scalar field theory. The results are consistent with the ones obtained by other means.Four pages, latex file. Submitted for the Proceedings of the XXIV Brazilian National Meeting on Particles and Fields held in Caxambu MG, Brazil, September 30 -- October 4, 2003High Energy Physics - Theorytext