Hashmi, G., M. N. . Huda, M. K. H. Mamun, and M. H. Rahman. “Design and Development of a Low-Cost 2.4 GHz GFSK Modulation Based Walkie-Talkie”. Dhaka University Journal of Applied Science and Engineering, vol. 7, no. 2, Apr. 2023, pp. 16-20, doi:10.3329/dujase.v7i2.65089.