Folded shells : a variational approach Danilo Percivale (1992) Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
Free vibration analysis of rectangular orthotropic membranes in large deflection. Zheng, Zhou-Lian, Liu, Chang-Jiang, He, Xiao-Ting, Chen, Shan-Lin (2009) Mathematical Problems in Engineering