@article{journal,
author = {Puigcerver, M. and Rodr{\'i}guez-Teijeiro, J. D.},
title = {Relationships between some activity variables and census in the Black-headed Gull (Larus ridibundus) in regard to certain meteorological parameters},
year = {1984},
volume = {8},
pages = {225--235},
journal = {Miscel·l{\`a}nia Zool{\`o}gica}
}