Lacy, M. C. De, Gil, A. J., Rodríguez-caderot, G., y Moreno, B. 2008. A Method to Estimate the Ionospheric bias by Using the New GNSS Frequencies: An Analysis of its Theoretical Accuracy in a PPP Context. Física de la Tierra 20, 133–150. Recuperado 6 de diciembre de 2025 a partir de https://revistas.ucm.es/index.php/FITE/article/view/FITE0808110133A