@article {carballo2002hierarchical,
	title = {Hierarchical network flow phase unwrapping},
	journal = {IEEE transactions on geoscience and remote sensing},
	volume = {40},
	number = {8},
	year = {2002},
	pages = {1695{\textendash}1708},
	publisher = {IEEE},
	author = {Carballo, Gabriel F and Fieguth, Paul W}
}
