@InProceedings{Michailidis2018b, author = {E. T. Michailidis, N. Nomikos, P. Bithas, D. Vouyioukas, and A. G. Kanatas}, booktitle = {10th International Conference on Advances in Satellite and Space Communications (SPACOMM 2018)}, title = {Optimal Relay Location and Oppοrtunistic User-Scheduling for Stratospheric Communications}, year = {2018}, }