Iskandar, I., and A. Wahyudi. “CINR Performance of Downlink Mobile WiMAX IEEE 802.16e Deployed Using Coexistence Cellular Terrestrial and HAPS”. Journal of ICT Research and Applications, vol. 8, no. 1, May 2014, pp. 64-83, doi:10.5614/itbj.ict.res.appl.2014.8.1.5.