@article {1992,
	title = {A variational method in image segmentation: existence and approximation result},
	journal = {Acta Math. 168 (1992), no.1-2, p. 89-151},
	number = {SISSA;48/89/M},
	year = {1992},
	publisher = {SISSA Library},
	url = {http://hdl.handle.net/1963/808},
	author = {Gianni Dal Maso and Jean-Michel Morel and Sergio Solimini}
}
