De Santis, A., L. Gaya-Piqué, G. Dominici, A. Meloni, J. M. Torta, and R. Tozzi. “ITalian Geomagnetic Reference Field (ITGRF): Update for 2000 and Secular Variation Model up to 2005 by Autoregressive Forecasting”. Annals of Geophysics 46, no. 3 (December 25, 2003). Accessed April 20, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/3422.