@article{rodriguezvetterlein2011,
	title     = {Logics for approximate and strong entailments},
	author    = {Francesc Esteva and  Lluis Godo and  Ricardo Rodriguez and Thomas Vetterlein},
	year      = {2011},
	journal   = {Fuzzy Sets and Systems},
	publisher = {To appear},
	state     = {inpress},
	acknowledged= {1}
}