2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/184025We show that at one-loop order, negative-dimensional, Mellin-Barnes' (MB) and Feynman parametrization (FP) approaches to Feynman loop integrals calculations are equivalent. Starting with a generating functional, for two and then for $N$-point scalar integrals we show how to reobtain MB results, using negative-dimensional and FP techniques. The $N-$point result is valid for different masses, arbitrary exponents of propagators and dimension.11 pages, LaTeX. To be published in J.Phys.AHigh Energy Physics - Phenomenologytext