@article {2000,
	title = {Local calibrations for minimizers of the Mumford-Shah functional with rectilinear discontinuity sets},
	journal = {J. Math. Pures Appl. 79, 2 (2000) 141-162},
	number = {SISSA;47/99/M},
	year = {2000},
	publisher = {SISSA Library},
	doi = {10.1016/S0021-7824(99)00140-3},
	url = {http://hdl.handle.net/1963/1261},
	author = {Gianni Dal Maso and Maria Giovanna Mora and Massimiliano Morini}
}
