@inproceedings{ferrante2007-1,
	author="A. Ferrante and M. Pavon and F. Ramponi",
	title="Constrained Spectrum Approximation in The Hellinger Distance",
	booktitle="Proceedings of the European Control Conference 2007 - ECC07",
	year="2007",
	month="July",
	pages="322-327",
	location="Kos Greece"
}