1. Uncertainty Theory;Liu,2007
2. Uncertainty Theory: A Branch of Mathematics for Modeling Human Uncertainty;Liu,2011
3. Hybrid process and uncertain process;Liu. Fuzzy Process;J. Uncertain. Syst.,2008
4. Some research problems in uncertainty theory;Liu;J. Uncertain. Syst.,2009
5. Liu process and uncertain calculus;Chen;J. Uncertain. Anal. Appl.,2013