@article {wong2010cpol,
	title = {CPOL: Complex phase order likelihood as a similarity measure for MR{\textendash}CT registration},
	journal = {Medical image analysis},
	volume = {14},
	number = {1},
	year = {2010},
	pages = {50{\textendash}57},
	publisher = {Elsevier},
	author = {Wong, Alexander and Clausi, David A and Fieguth, Paul}
}
