- Influence of High Speed Railway Catenary Overlap Span on the Current Collecting Performance,
J. Zhang, W. Liu and M. Yu
Paper 8.141 from CCP: 104, ISBN 978-1-905088-59-1 (2014)
- General Eigenvalue Test for Nonlinear Finite Elements,
W. Liu and Y-B. Yang
Paper 9.2 from CCP: 9/10, ISBN 0-948749-10-5 (1989)