Poulier, P.-L.; Liang, Z.-C.; Fournier, D.; Gizon, L.: Contribution of flows around active regions to the north-south helioseismic travel-time measurements. Astronomy and Astrophysics 664, p. A189 (2022)
Dr. Theodosios Chatzistergos receives award by the European Space Weather and Space Climate Association for his research findings on the historical activity of the Sun.