@article {cordero2013groupwise,
	title = {Groupwise elastic registration by a new sparsity-promoting metric: application to the alignment of cardiac magnetic resonance perfusion images},
	journal = {Pattern Analysis and Machine Intelligence, IEEE Transactions on},
	volume = {35},
	number = {11},
	year = {2013},
	pages = {2638{\textendash}2650},
	publisher = {IEEE},
	author = {Lucilio Cordero-Grande and S. Merino-Caviedes and Santiago Aja-Fern{\'a}ndez and Carlos Alberola-Lopez}
}
