- Yisheng Song, Liqun Qi, “Necessary and sufficient conditions for copositive tensors”, Linear and Multilinear Algebra, 63, no. 1, 2015, 120
- Yisheng Song, Liqun Qi, “Spectral Properties of Positively Homogeneous Operators Induced by Higher Order Tensors”, SIAM J. Matrix Anal. & Appl., 34, no. 4, 2013, 1581
- Yisheng Song, Liqun Qi, “Eigenvalue analysis of constrained minimization problem for homogeneous polynomial”, J Glob Optim, 64, no. 3, 2016, 563