i, D., Lazzeri, N., Hanson, D., De Rossi, D. "HEFES: An Hybrid Engine for Facial Expressions Synthesis to Control Human-Like Androids and Avatars", The Fourth IEEE RAS/EMBS International Conference on Biomedical Robotics and Biomechatronics, 2012. Bergman, M., Zhuang, Z., Palmiero, A., Wander, J., Heimbuch, B., M