@article{journal,
author = {Ros, J.},
title = {Cat{\'a}logo provisional de los Opistobranquios (Gastropoda: Euthyneura) de las costas ib{\'e}ricas},
year = {1976},
volume = {3-5},
pages = {21--51},
journal = {Miscel·l{\`a}nia Zool{\`o}gica}
}