Martha C. Orazulume and  Jibril D. Jiya,  Design of Optimal Proportional Integral Derivative Attitude Controller for an Uncoupled Flexible Satellite Using Particle Swarm Optimization.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2016, vol. 110(2). 341 - 346
    [viewed 20 February 2020]. Available from: https://publications.waset.org/pdf/10003824.