@article {Katsianis2011,
	title = {The option to expand to a next generation access network infrastructure and the role of regulation in a discrete time setting: A real options approach},
	journal = {Telecommunications Policy},
	volume = {35},
	number = {9-10},
	year = {2011},
	pages = {895-906},
	author = {Charalampopoulos, G. and Katsianis, D and Varoutas, D}
}
