Nonlinear Analysis of Spur Gear Pair with Time-varying Mesh StiffnessT. V. V. L. N. Rao, M. Awang, M. R. Lias and A. M. A. RaniMATEC Web of Conferences, 13 (2014) 04032DOI: https://doi.org/10.1051/matecconf/20141304032