@conference {li2009ridge,
	title = {Ridge-branch-based blood vessel detection algorithm for multimodal retinal images},
	booktitle = {Proceedings of SPIE},
	volume = {7259},
	year = {2009},
	pages = {72594K},
	author = {Li, Y and Hutchings, N and Knighton, RW and Gregori, G and Lujan, RJ and Flanagan, JG}
}
