2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/197495This paper presents a first example of parasupersymmetric relativistic quantum-mechanical model with non-oscillator-like interaction: the Coulomb problem for the modified Stueckelberg equation, describing a relativistic massive spin-1 particle in the electromagnetic field of a point charge.5 pages, LaTeX, no figures (updated version with corrected misprints and slightly improved English, compared to the original publication)High Energy Physics - Theorytext