Peter N. Khakina and  Mohammed I. Ali and  Enchun Zhu and  Huazhang Zhou and  Baydaa H. Moula,  Effect of the Rise/Span Ratio of a Spherical Cap Shell on the Buckling Load.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2011, vol. 56(8). 335 - 341
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