Marziyeh Halimi and Roushanak Lotfikar and Simin Mansouri Borojeni, Solving of the Fourth Order Differential Equations with the Neumann Problem. journal = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology. October 2011, vol. 58(10). 1647 - 1649 [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/7492.