@conference {Botero2009,
	title = {Study of SnS:Bi thin films prepared by sulfurization},
	booktitle = {2009 34th IEEE Photovoltaic Specialists Conference (PVSC)2009 34th IEEE Photovoltaic Specialists Conference (PVSC)},
	year = {2009},
	publisher = {IEEE},
	organization = {IEEE},
	address = {Philadelphia, PA, USA},
	isbn = {978-1-4244-2949-3},
	doi = {10.1109/PVSC.2009.5411154},
	url = {http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=5411154},
	author = {Botero, M. and Bartolo Perez, P. and Calderon, C. and Romero, E. and Gordillo, G.}
}
