1. Li MZ, Nakamura K, Watanabe S (1992) Study of the basic principles (1st report: Research on Multi-point forming for sheet metal). Proc of the Japanese Spring Conf for Technology of Plasticity 519–522 (in Japanese)
2. Li MZ, Nakamura K (1992) Harmful phenomena in multi-point forming (3rd report: Research on multi-point forming for sheet metal). Proc of the 43rd Japanese Joint Conf for Technology of Plasticity 425–428 (in Japanese)
3. Li Mingzhe, Liu Yuhong (1999) Multi-point forming: a flexible manufacturing method for a 3D surface sheet. J Mater Process Technol 87:277–280
4. Hardt DE, Gossard DC (1980) A variable geometry die for sheet metal forming: machine design and control. Proc of the Joint Automatic Control Conference, San Francisco, Aug
5. Hardt DE et al (1981) Sheet metal forming with discrete die surface. Proc 9th NAMRC 140–144