Pikridas, C., Bitharis, S., Katsougiannopoulos, S., Spanakaki, K. and Karolos, I.-A. (2019) “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, 45(3), pp. 137-146. doi: 10.3846/gac.2019.10246.