Salles V. G. Magalhaes ˜, Marcus V. A. Andrade and W. Randolph Franklin (2011) “Multiple Observer Siting in Huge Terrains Stored in External Memory”, International Journal of Computer Information Systems and Industrial Management Applications, 3, p. 7. Available at: https://cspub-ijcisim.org/index.php/ijcisim/article/view/78 (Accessed: 3 May 2026).