অনুযায়ী Solórzano, Alejandro, Greene, Harry W.

প্রতিষ্ঠান: Universidad Estatal a Distancia

Repositorio: Portal de Revistas UNED

অনুযায়ী Kazandjian, Taline, Petras, Daniel, Van Thiel, Jory, Greene, Harry W., Arbuckle, Kevin, Carter, David, Wouters, Roel M., Whiteley, Gareth, Wagstaff, Simon C., Arias, Ana S., Albulescu, Laura-Olana, Plettenberg Laing, Anthony, Hall, Cara, Heap, Adam, Penrhyn Lowe, Samuel, McCabe, C. V., Ainsworth, Stuart, da Silva, Ricardo, Dorrestein, Pieter C., Richardson, Michael K., Gutiérrez, José María, Calvete, Juan J., Harrison, Robert A., Vetter, Irina, Undheim, Eivind Andreas Baste, Wüster, Wolfgang, Casewell, Nicholas R., Robinson, Dale, Barlow, Axel

প্রতিষ্ঠান: Universidad de Costa Rica

Repositorio: Kérwá