@conference {SchmitzerSchnoerr-SSVM2013,
	title = {A Hierarchical Approach to Optimal Transport},
	booktitle = {Scale Space and Variational Methods (SSVM 2013)},
	year = {2013},
	pages = {452-464},
	author = {Bernhard Schmitzer and Christoph Schn{\"o}rr}
}
