Bianchi VI0&III models: self-similar approach

We study several cosmological models with Bianchi VI0&III symmetries under the self-similar approach. We find new solutions for the 'classical' perfect fluid model as well as for the vacuum model although they are really restrictive for the equation of state. We also study a perfect fluid model with time-varying constants, G and Delta *L. As in other studied models we find that the behaviour of G and Delta *L are related. If G behaves as a growing time function then Delta *L is a positive decreasing time function but if G is decreasing then Delta *L0 is negative. We end by studying a massive cosmic string model, putting special emphasis in calculating the numerical values of the equations of state. We show that there is no SS solution for a string model with time-varying constants.