Pikridas, C., S. Bitharis, S. Katsougiannopoulos, K. Spanakaki, and I.-A. Karolos. “Study of TEC Variations Using Permanent Stations GNSS Data in Relation With Seismic Events. Application on Samothrace Earthquake of 24 May 2014”. Geodesy and Cartography, vol. 45, no. 3, Dec. 2019, pp. 137-46, doi:10.3846/gac.2019.10246.