@article{ferrante2008,
	author="A. Ferrante and M. Pavon and F. Ramponi",
	title="Hellinger versus Kullback-Leibler multivariable spectrum approximation",
	journal="IEEE Transactions on Automatic Control",
	year="2008",
	pages="954-967",
	volume="53",
	issn="0018-9286"
}