Presence of anisotropic pressures in Lema\^{i}tre-Tolman-Bondi   cosmological models
  We describe Lema\^{i}tre-Tolman-Bondi cosmological models where an anisotropic pressures is considered. By using recent astronomical observations coming from supernova of Ia types we constraint the values of the parameters that characterize our models. 
Sergio del Campo, Victor H. Cardenas and Ramon Herrera
astro-ph.CO gr-qc