1. Aazb, M., Rabbany, E.L., Shoukry, M. Precise Point Positioning using combined GPS/GLONASS measurements, in: FIG Working Week 2011, Bridging the Gap between Cultures. Marrakech, Morocco, 18–22 May 2011.
2. Strong interseismic coupling fault after slip, and viscoelastic flow before and after the October 9, 1995 Colima-Jalisco earthquake; continuous GPS measurements from Colima, Mexico;Azua;Geophys. Res. Lett.,2002
3. Bent, R., Llewellyn, S., Schmid, P. A Highly Successful Empirical Model for the Worldwide Ionospheric Electron Density Profile. Rep, Florida, 1972a.
4. Bent, R., Llewellyn, S., Walloch, M. Description and Evaluation of the Bent Ionospheric Model. Rep, Florida, 1972b.
5. International Reference Ionosphere: recent developments;Bilitza;Radio Sci.,1986