@conference {12928,
	title = {Study of the visual contact of selected areas of the island of Ithaca with the landfill - Analysis of the problem using an appropriate algorithm in GIS.},
	booktitle = {5th Pan-hellenic Geographical Conference},
	year = {1999},
	author = {Vaiopoulos, D. and Vassilopoulos, A. and Evelpidou, N.}
}
