@article {1648,
	title = {Unsupervised Retinal Vessel Segmentation Using Combined Filters},
	journal = {Plos One},
	volume = {11},
	number = {2},
	year = {2016},
	pages = {1-21},
	doi = {10.1371/journal.pone.0149943},
	author = {Wendeson S. Oliveira and Joyce Vitor Teixeira and Ing Ren Tsang and George D C Cavalcanti and Jan Sijbers}
}
