1. Zhang Jinwen, The Normal Fuzzy Set Structures and the Boolean-valued Models, J. of Huazhong Institute of Technology, vol. VII, no. 2, 1979 (in Chinese with an English abstract); English Edition, vol. 2, no. 1, 1980.
2. Zhang Jinwen, Some Basic Properties of Normal Fuzzy Set Structures, J. of Huazhong Institute of Technology, vol. VII, no. 3, 1979 (in Chinese with an English abstract). There is a separate edition (in English).
3. Zhang Jinwen, Fuzzy Set Structures and Normal Fuzzy Set Structures, submitted for formal publication, to appear, Symposium on Fuzzy. Sets and Possibility Theory, December 1216, 1980 at Acapulco, Mexico.
4. Zhang Jinwen, A Unified Treatment of Fuzzy Set Theory and Boolean-valued Set Theory — Fuzzy Set Structures and Normal Fuzzy Set Structures, J. of Mathematical Analysis and Applications, vol. 76, no. 1, July 1980.
5. Zhang Jinwen, A Kind of Nonstandard Models of the Axiomatic Set Theory with Urelements — the Normal Fuzzy Set Structure, Selected papers on Mathematics at 1979’s Annual Meeting of Beijing Society for Mathematics.