1. Zheng, Q. and Zhuang, D. Integral global optimization of constrained problems in functional spaces with discontinuous penalty functions. Recent Advances in Global Optimization (eds. Floudas, C. A. and Pardalos, P. M.), Princeton University Press, New Jersey, 298–320 (1992)
2. He, Z. Z., Cui, H. Q., and Zheng, Q. Finite dimensional approximation to global minima—an integral approach (in Chinese). OR Transactions, 9(1), 21–31 (2005)
3. Phu, H. X. and Hoffmann, A. Essential supremum and supremum of summable functions. Numerical Functional Analysis and Optimization, 17(1), 167–180 (1996)
4. Wu, D. H., Yu, W. Y., and Zheng, Q. A sufficient and necessary condition for global optimization. Applied Mathematics Letters, 23(1), 17–21 (2010)
5. Chen, L., Yao, Y. R., and Zheng, Q. Discontinuous penalty approach with deviation integral for global constrained minimization. Applied Mathematics and Mechanics (English Edition), 30(9), 1201–1210 (2009) DOI 10.1007/s10483-009-0915-x