[BiO BB] Least Square Methods

[Felipe Albrecht]

Hi,

Im searching techniques for inferring phylogenies and I see the "Least
Square methods".

I read  that have some algorithms that implements this methods with
considerable differences.
So, I search in Joe Felsenstein's book about this algorithms, but I
only found "how it works" and not some algorithms descriptions.

I also read the Fitch and Kitsch programs source, but I continue with
many doubts regarding the least square algorithms.

Some one haves a algorithm in computational or mathematics format ?
Or a simple computer implementation?

Thanks

Felipe Albrecht