@article {wong2009systematic,
	title = {A systematic approach to feature tracking of lumbar spine vertebrae from fluoroscopic images using complex-valued wavelets},
	journal = {Computer methods in biomechanics and biomedical engineering},
	volume = {12},
	number = {5},
	year = {2009},
	pages = {607{\textendash}616},
	publisher = {Taylor \& Francis Group},
	author = {Wong, Alexander and Dunk, Nadine M and Callaghan, Jack P}
}
