@article{journal,
author = {Gracia, M. P. and Igual, J.},
title = {Los ciliados como organismos saprobios de las aguas},
year = {1987},
volume = {11},
pages = {1--11},
journal = {Miscel·l{\`a}nia Zool{\`o}gica},
keywords = {Protozoa, Ciliata, Saprobic organisms, Water quality}
}