ARTICLE Muhlbauer_RAL_2024/IDIAP A Probabilistic Approach to Multi-Modal Adaptive Virtual Fixtures Mühlbauer, M. Hulin, T. Weber, B. Calinon, Sylvain Stulp, F. Albu-Schäffer, A. Silverio, J. robot learning EXTERNAL https://publications.idiap.ch/attachments/papers/2024/Muhlbauer_RAL_2024.pdf PUBLIC IEEE Robotics and Automation Letters (RA-L) 2024