1. S.J. Liao, “An analytic approximate approach for free oscillations of self-excited systems”,International Journal ofNon-Linear Mechanics, vol. 39, pp. 271-280 (2004).[PDF]
2. S.J. Liao and I. Pop, “Explicit analytic solution for similarity boundary layer equations”,International Journal of Heat and Mass Transfer, vol. 47, pp. 75-85 (2004) (DOI: 10.1016/S0017-9310(03)00405-8).[PDF]
3. Y.Y. Wu and S.J. LIAO, “Solving the one-loop soliton solution of the Vakhnenko equation by means of the Homotopy Analysis Method”,Chaos, Solitons and Fractals, vol. 23, pp. 1733-1740 (2004) (DOI: 10.1016/j.chaos.2004.06.081).[PDF]
4. S.J. Liao, “On the homotopy analysis method for nonlinear problems”,Applied Mathematics and Computation, vol. 147, pp. 499-513 (2004) (DOI: 10.1016/S0096-3003(02)00790-7).[PDF]