Valente, R., Parente, M., Jorge, N., Sousa, R., Cardoso, R. P., Cesar de Sa, J., & Gracio, J. (2005, July). Enhanced assumed strain shell and solid-shell finite element formulations for sheet metal forming. Paper presented at Congreso de M ́etodos Num ́ericos en Ingenieria, Granada, Spain, July, 2005, Granada, Spain