%A Thi Thuy Anh Vu %A Huy Bich Dao %A Dinh Duc Nguyen %T Nonlinear Post-Buckling Analysis of Thin Sigmoid FGM Annular Spherical Shells Surrounded on Elastic Foundations under Uniform External Pressure Including Temperature Effects %C Hanoi, Vietnam %D 2014 %L SisLab1226