@article {liu2011synthesis,
	title = {Synthesis of remote sensing label fields using a tree-structured hierarchical model},
	journal = {IEEE transactions on geoscience and remote sensing},
	volume = {49},
	number = {6},
	year = {2011},
	pages = {2060{\textendash}2070},
	publisher = {IEEE},
	author = {Liu, Ying and Wong, Alexander and Fieguth, Paul}
}
