@article { 2417,
	title = {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},
	year = {9999},
	URL = {http://arxiv.org/abs/0910.5755},
	author = {Jose Pedro Mimoso and Morgan Le Delliou and Filipe C. Mena}
}