@article {1995,
	title = {An existence result in a problem of the vectorial case of the calculus of variations},
	year = {1995},
	publisher = {SIAM},
	abstract = {SIAM J. Control Optim. 33 (1995) 960-970},
	url = {http://hdl.handle.net/1963/3513},
	author = {Arrigo Cellina and Sandro Zagatti}
}
@article {1994,
	title = {A version of Olech\\\'s lemma in a problem of the calculus of variations},
	journal = {SIAM J. Control Optim. 32 (1994) 1114-1127},
	year = {1994},
	publisher = {SIAM},
	abstract = {This paper studies the solutions of the minimum problem for a functional of the gradient under linear boundary conditions. A necessary and sufficient condition, based on the facial structure of the epigraph of the integrand, is provided for the continuous dependence of the solutions on boundary data.},
	doi = {10.1137/S0363012992234669},
	url = {http://hdl.handle.net/1963/3514},
	author = {Arrigo Cellina and Sandro Zagatti}
}
@article {1991,
	title = {A class of absolute retracts of dwarf spheroidal galaxies},
	journal = {Proc.Amer.Math.Soc. 112 (1991), no.2, 413},
	number = {SISSA;79/89/M},
	year = {1991},
	publisher = {SISSA Library},
	url = {http://hdl.handle.net/1963/837},
	author = {Alberto Bressan and Arrigo Cellina and Andrzej Fryszkowski}
}
@article {1989,
	title = {Upper semicontinuous differential inclusions without convexity},
	journal = {Proc. Amer. Math. Soc.  106  (1989),  no. 3, 771-775},
	number = {SISSA;74/88/M},
	year = {1989},
	publisher = {SISSA Library},
	url = {http://hdl.handle.net/1963/670},
	author = {Alberto Bressan and Arrigo Cellina and Giovanni Colombo}
}
