Abdul Halim Zaim Zaim, A. H., Perros, H. G., & Rouskas, G. N. (2003). Computing call-blocking probabilities in leo satellite constellations. IEEE Transactions on Vehicular Technology, 52(3), 622–636. https://doi.org/10.1109/TVT.2003.811219 Zaim, A. H., Rouskas, G. N., & Perros, H. G. (2002). Computing call-blocking probabilities in LEO satellite networks: The single-orbit case. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 51(2), 332–347. https://doi.org/10.1109/25.994809