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 (Dec. 2019), 137-146. DOI:https://doi.org/10.3846/gac.2019.10246.