1.       A tapered Timoshenko–Euler beam element for analysis of steel portal frames
GQ Li, JJ Li - Journal of Constructional Steel Research, 2002

2.       Analysis of frames with non-prismatic members
G Ozay, A Topcu - Can. J. Civ. Eng, 2000

3.      Second-order inelastic analysis of steel gable frames comprising tapered members
GQ Li, JJ Li, PR China - Structural Failure and Plasticity: Proceedings of the …, 2000

4.       Buckling analysis of non-prismatic columns based on modified vibration modes
AR Rahai, S Kazemi - Communications in Nonlinear Science and Numerical Simulation, 2008