by Valdiviezo Diaz, P.

by Valdiviezo Diaz, P.; Torres Diaz, J.

by Aguilar Castro, J.; Valdiviezo Diaz, P.; Riofrio Calderon, G.

by Cordero Zambrano, J.; Aguilar Castro, J.; Valdiviezo Diaz, P.

by Cordero Zambrano, J.; Aguilar Castro, J.; Reategui Rojas, R.; Valdiviezo Diaz, P.

by Agila Palacios, M.; Jara Roa, D.; Sarango Lapo, C.; Valdiviezo Diaz, P.

by Cordero Zambrano, J.; Aguilar Castro, J.; Encalada Encalada, A.; Valdiviezo Diaz, P.; Riofrio Calderon, G.

by Cordero Zambrano, J.; Aguilar Castro, J.; Sánchez, M.; Chamba Eras , L.; Barba Guaman, L.; Valdiviezo Diaz, P.

by Sun, Y.; Barba Guaman, L.; Valdiviezo Diaz, P.; Dongfeng, L.; Riofrio Calderon, G.

by Arias Tapia, S.; Torres Diaz, J.; Riofrio Calderon, G.; Gomez Alvarado, H.; Guaman Bastidas, F.; Barbosa Corbacho, J.; Garcia Samaniego, J.; Gonzalez Eras, A.; Valdiviezo Diaz, P.; Ratter, R.; Reategui Rojas, R.