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• ⦁ B. Liu, Uncertainty Theory: A Branch of Mathematics for Modeling Human Uncertainty, Springer-Verlag, Berlin, Germany, 2010.
• ⦁ Y. H. Liu, Uncertain random variables: A mixture of uncertainty and randomness,Soft Comput. 17 (2013) 625-634.
• ⦁ Y. H. Liu, Uncertain random programming with applications, Fuzzy Optim. Decis. Ma. 12 (2013) 153-169.
• ⦁ Y.H. Liu, D.A. Ralescu, Value-at-risk in uncertain random risk analysis, Information Sciences 391 (2017) 1-8.
• ⦁ B. Liu, Uncertain random graph and uncertain random network, J. Uncertain Syst. 8 (2014) 3-12.
• ⦁ J. Zhou, F. Yang, K. Wang, Multi-objective optimization in uncertain random environments, Fuzzy Optim. Decis. Ma. 13 (2014) 397-413.
• ⦁ J.W. Gao, K. Yao, Some concepts and theorems of uncertain random process, Int. J. Intell. Syst. 30 (1) (2015) 52–65.
• ⦁ K. Yao, J.W. Gao, Uncertain random alternating renewal process with application to interval availability, IEEE Trans. Fuzzy Syst. 23 (5) (2015) 1333–1342.
• ⦁ H. Ke, H. Liu, G. G. Tian, An uncertain random programming model for project scheduling problem, Int. J. Intell. Syst.30 (2015) 66-79.
• ⦁ H. Ahmadzade, R. Gao, H. Zarei, Partial quadratic entropy of uncertain random variables, J. Uncertain Syst. 10 (2016) 292-301.
• ⦁ H. Dalman Uncertain random programming models for fixed charge multi-item solid transportation problem, New Trends in Mathematical Sciences, Volume: 6(1), (2018) 37-51.
• ⦁ Y. H. Sheng, Y. Gao, Shortest path problem of uncertain random network, Comput. Ind. Eng. 99 (2016) 97-105.
• ⦁ B. Liu, Some research problems in uncertainty theory, J. Uncertain Syst. 3 (2009) 3-10.