BibTex format
@article{Toma:2003,
author = {Toma, T and Hopkinson, N and Hillier, J and Hansell, D and Morgan, C and Goldstraw, P and Polkey, M and Geddes, D},
journal = {Lancet},
pages = {931--933},
title = {Bronchoscopic volume reduction with valve implants in patients with severe emphysema},
volume = {361},
year = {2003}
}