Ashraf, Z., Choudhry, M. A. and Hanif, A. (2012) “A HYBRID PI CONTROL SCHEME FOR AIRSHIP HOVERING”, The Nucleus, 49(2), pp. 115–127. Available at: http://thenucleuspak.org.pk/index.php/Nucleus/article/view/805 (Accessed: 21 July 2024).