Jácome, M. I., C. Izarra, V. Constanzo-Álvarez, and O. Mirón-Valdespino. “Gravimetric Modeling of the Parguaza Granitic Intrusion, Guyana Precambrian Shield, Southwestern Venezuela Using Geochronological Constraints”. Geofisica Internacional, vol. 43, no. 3, July 2004, pp. 383-9, doi:10.22201/igeof.00167169p.2004.43.3.965.