“Investigating the Accuracy of IRI Model for the Ionospheric TEC Parameter During Strong, Severe and Great Geomagnetic Storms from 2000-2013”. Iraqi Journal of Science, vol. 57, no. 3A, Mar. 2023, pp. 2075-9, https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/9964.