• Modernization of the Estonian national GNSS reference station networkMetsar, Jaanus; Kollo, Karin; Ellmann, ArtuGeodesy and cartography2018 / p. 55-62 : ill https://doi.org/10.3846/gac.2018.2023 https://www.scopus.com/sourceid/28610 https://www.scopus.com/record/display.uri?eid=2-s2.0-85051438328&origin=inward&txGid=0e38d8cff9bfcc4d6d831548523cb07b