@mastersthesis {1863,
	title = {The {\textquoteright}Gas of Circles{\textquoteright} Model and its Application to Tree Crown Extraction},
	volume = {PhD},
	year = {2007},
	month = {December 2007},
	school = {University of Nice - Sophia Antipolis and University of Szeged},
	type = {PhD Thesis},
	author = {Peter Horvath}
}
