Robuta

https://www.ocu.org/inversiones/invertir/acciones/analisis/2016/10/ion-geophysical-delicada-salud-financiera

https://www.ocu.org/inversiones/invertir/acciones/analisis/2012/12/ion-geophysical-cambio-de-consejo

https://www.ocu.org/inversiones/invertir/acciones/analisis/2016/02/ion-geophysical-con-el-agua-al-cuello