Andrei Vorobev, Olga Khristodulo, Oksana Efremova, Gulnara Vorobeva. "ALGORITHM OF GEOMAGNETIC ACTIVITY IERR/DERR-INDICES CALCULATION AND ITS PROGRAMMING REALIZATION." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Informatics, Geoinformatics and Remote Sensing, 2017, pp. 59-66. https://doi.org/10.5593/sgem2017/22/s09.008