@article{Cortés_Fonseca_2001, title={Preliminary pages}, volume={48}, url={https://revistas.ucr.ac.cr/index.php/rbt/article/view/29330}, number={S1}, journal={Revista de Biología Tropical}, author={Cortés, Jorge and Fonseca, Ana Cecilia}, year={2001}, month={Dec.}, pages={xiii } }