Tawfik, M., M. Mohsin, and H. Abd Al-Amir. “Control on a 2-D Wing Flutter Using an Adaptive Nonlinear Neural Controller”. Al-Khwarizmi Engineering Journal, Vol. 7, no. 4, Jan. 2018, pp. 27-40, http://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/78.