  We 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.
