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We show that at one-loop order, negative-dimensional, Mellin-Barnes' (MB) andFeynman parametrization (FP) approaches to Feynman loop integrals calculationsare equivalent. Starting with a generating functional, for two and then for$N$-point scalar integrals we show how to reobtain MB results, usingnegative-dimensional and FP techniques. The $N-$point result is valid fordifferent masses, arbitrary exponents of propagators and dimension.Comment: 11 pages, LaTeX. To be published in J.Phys.

One-loopn-point equivalence among negative-dimensional, Mellin–Barnes and Feynman parametrization approaches to Feynman integrals