@article{journal,
author = {Lokki, H. and Saurola, P.},
title = {Comparing timing and routes of migration based on ring encounters and randomization methods},
year = {2004},
volume = {27.1},
pages = {357--368},
journal = {Animal Biodiversity and Conservation},
keywords = {Ruta migratoria, Adecuaci{\'o}n temporal de las migraciones, Hallazgos de anillas, Randomizaci{\'o}n}
}