%0 Generic %D 9999 %T Separating expansion from contraction in spherically symmetric models with a perfect-fluid: Generalization of the Tolman-Oppenheimer-Volkoff condition and application to models with a cosmological constant %A Mimoso, Jose Pedro %A Delliou, Morgan Le %A Mena, Filipe %U http://arxiv.org/abs/0910.5755