@article{journal,
author = {Gardner, T.},
title = {Declining amphibian populations: a global phenomenon in conservation biology},
year = {2001},
volume = {24.2},
pages = {25--44},
journal = {Animal Biodiversity and Conservation},
keywords = {Disminuci{\'o}n de anfibios, Degradaci{\'o}n ambiental, Impacto humano indirecto, Control de poblaciones}
}