Skeivalas, Jonas. “Ionospheric Influence on Increment of GPS Chord Coordinations, Using Double Carrier Phase Differences”. Geodesy and Cartography 33, no. 2 (August 3, 2012): 37-40. Accessed December 2, 2024. https://ijspm.vgtu.lt/index.php/GAC/article/view/10918.