@inbook{GrMaTr00,
	author = {Patrick Groenen and Rudolf Mathar and Javier Trejos},
	title = "Global optimization methods for {M}ultidimensional {S}caling applied to mobile communications",
	pages = "459-470",
	publisher = "Springer-Verlag",
	series = "Data Analysis",
	editor = "W.Gaul, O.Opitz, M. Schader",
	address = "Berlin",
	month = Apr,
	year = 2000,
	hsb = {RWTH-CONV-223641},
	}