Song, S.-M., Vohnout, V., Waldron, K., & Kinzel, G. (1984). Computer-Aided Design of a Leg for an Energy Efficient Walking Machine. Mechanism and Machine Theory. https://doi.org/10.1016/0094-114X(84)90005-3
Song, Shin-Min, V. Vohnout, Kenneth Waldron, and G. Kinzel. 1984. “Computer-Aided Design of a Leg for an Energy Efficient Walking Machine”. Mechanism and Machine Theory. https://doi.org/10.1016/0094-114X(84)90005-3.
Song, S.-M., V. Vohnout, K. Waldron, and G. Kinzel. Computer-Aided Design of a Leg for an Energy Efficient Walking Machine. Mechanism and Machine Theory, 1 Jan. 1984, doi:10.1016/0094-114X(84)90005-3.