For citations:

Kalach A.V., Kalach E.V., Vytovtov A.V. Use of free aircraft for ensuring the fire safety of linear objects of oil and gas industry. Pozharovzryvobezopasnost/Fire and Explosion Safety. 2018;27(12):49-55. (In Russ.) https://doi.org/10.18322/PVB.2018.27.12.49-55