WASET
Honjo, T. , Hayashi, T. , Nagano, A. , Luo, Z. (2011), 'Target Trajectory Design of Parametrically Excited Inverted Pendulum for Efficient Bipedal Walking', World Academy of Science, Engineering and Technology, Open Science Index 59, International Journal of Mechanical and Mechatronics Engineering, 5(11), 2359 - 2366.