SafeSwarm: Decentralized Safe RL for the Swarm of Drones Landing in Dense Crowds. - Grik Tadevosyan; Maksim Osipenko; Demetros Aschu; Aleksey Fedoseev; Valerii Serpiva; Oleg Sautenkov; Sausar Karaf; Dzmitry Tsetserukou (HRI, 2025)