TY - JOUR T1 - Approximate Analytic Solutions to Non-symmetric Stance Trajectories of the Passive Spring-Loaded Inverted Pendulum with Damping A1 - Saranli, U. A1 - Arslan, O. A1 - Ankarali, M.M. A1 - Morgul, O. JA - Nonlinear Dynamics Y1 - 2010 VL - 62 SP - 729 EP - 731 ER -