Ibrahim Sadek 0001 Taher Abualrub Marwan Abukhaled A computational method for solving optimal control of a system of parallel beams using Legendre wavelets. 1253-1264 2007 45 Math. Comput. Model. 9-10 https://doi.org/10.1016/j.mcm.2006.10.008 db/journals/mcm/mcm45.html#SadekAA07