@article{journal,
author = {Guallar, S. and Santana, E. and Contreras, S. and Verdugo, H. and Gall{\'e}s, A.},
title = {Paseriformes del Occidente de M{\'e}xico: morfometr{\'i}a, dataci{\'o}n y sexado},
year = {2009},
volume = {5},
pages = {1--488},
journal = {Monografies del Museu de Ci{\`e}ncies Naturals}
}