Paper  bibtex   

@article{JCMonteiroUPjournal2016,
	title ="Multimodal Hierarchical Face Recognition using Information from 2.5D Images",
	author = "Joao C. Monteiro and Tiago Freitas and Jaime S. Cardoso",
	journal = "U.Porto Journal of Engineering",
	year = "2016",
	pages = "39--54",
	url = "http://www.inescporto.pt/~jsc/publications/journals/2016JoaoCMonteiroUPJournal.pdf",
}