Ragauskas, U., D. Bručas, and J. Sužiedelytė Visockienė. “Research on Presice Point Positioning and Real-Time Kinematics Corrections for Unmanned Aerial Vehicle Global Positioning Systems”. Aviation, vol. 21, no. 1, Mar. 2017, pp. 17-22, doi:10.3846/16487788.2017.1303543.