M. Ghalambaz and  A.R. Noghrehabadi and  M.A. Behrang and  E. Assareh and  A. Ghanbarzadeh and  N.Hedayat,  A Hybrid Neural Network and Gravitational Search Algorithm (HNNGSA) Method to Solve well known Wessinger's Equation.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2011, vol. 49(1). 147 - 151
    [viewed 20 February 2020]. Available from: https://publications.waset.org/pdf/2312.