Bằng Goetz, Michael A., Hensens, Otto D., Zink, Deborah L., Borris, Robert P., Morales Quirós, Juan Francisco, Tamayo Castillo, Giselle, Slaughter, Robert S., Felix, John P., Ball, Richard G.

Tổ chức giáo dục: Universidad de Costa Rica

Repositorio: Kérwá