Is the reference to (Gonzalez-Barahona, 2007) still valid? - I replaced the associated text with something about GNU/Linux distributions.
I also changed text close to (Acohido, 2002) - so this reference might also nolonger apply ?
I think the Gonzalez-Barahona should be used in conjunction with a newer source. I will look for one tomorrow.
The Acohido reference still applies. Thanks for adding DistroWatch.