1. Uncertainty theory;Liu,2007
2. Some research problems in uncertainty theory;Liu;J. Uncertain Syst.,2009
3. A sufficient and necessary condition of uncertainty distribution;Peng;J. Interdiscip. Math.,2010
4. Uncertainty theory: a branch of mathematics for modeling human uncertainty;Liu,2010
5. Fuzzy process, hybrid process and uncertain process;Liu;J. Uncertain Syst.,2008