Tayyebi K, Haghighi AM, Attarnejad R. A new nine-node element for analysing plates with varying thickness using basic displacement functions. J. Mech. Eng. Sci. [Internet]. 2018 Dec. 27 [cited 2024 Apr. 23];12(4):4056-71. Available from: https://journal.ump.edu.my/jmes/article/view/1084