TOÀN. USING PI CONTROLLER TRACKS LANDING TRAJECTORY SIZE SMALL UAV. Journal of Military Science and Technology, [S. l.], n. 69, p. 3–12, 2020. DOI: 10.54939/1859-1043.j.mst.69.2020.3-12. Disponível em: https://jmst.mod.gov.vn/index.php/jmst/article/view/139. Acesso em: 12 mar. 2026.