00629naa#a2200169#i#450# EN\\bibl\106904 20251217002026.3 2413-2527 20251215b2025####ek#y0engy0150####ca RU Development of Visual Navigation Systems for Unmanned Aerial Vehicles in Environments Lacking GPS Signals Journal article Saint-Petersburg FSBEI HE "Emperor Alexander I St. Petersburg State Transport University" 2025 6 с. Journal article local Анализ изображения. 004.932.2 Zlobin Sergey Evgen'evich itt-pgups.ru