Quartic Equation: do you know a procedural way to solve it ?

Hi folks,
I need to write an algorithm to solve a general quartic equation like
this:

a*x^4 + b*x^3 + c*x^2 + d*x + e

I've googled a lot before writing a post here, because I though it was
obvious to find out a way.
Indeed, there are many explanations, but they are theoretical and not
suitable for writing an algorithm.
What I'm looking for is a sequence of steps (a procedural method) for
finding out roots of a quartic equation.

Thank for your patient.

Iacopo

PS: as far as I write it down, I'm going to make the source code
public.
.

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