Tran, Quang-Nhat, et al. “D2D Multi-Hop Multi-Path Communications in B5G Networks: A Survey on Models, Techniques, and Applications”. EAI Endorsed Transactions on Industrial Networks and Intelligent Systems, vol. 7, no. 25, Jan. 2021, p. e3, https://doi.org/10.4108/eai.7-1-2021.167839.