L. Qiao, C. Xu, and B. Ni, “Reinforcement Learning Method for Collaborative Multi-Objective Path Planning of IIoT Drones and Unmanned Vehicles in Random Demand and Dynamic Delivery Environments”, EAI Endorsed Scal Inf Syst, vol. 13, no. 2, Aug. 2026, doi: 10.4108/eetsis.13700.