TY - RPRT TI - Robust closed-loop control of isometric muscle force using pulsewidth modulation. AU - H J Chizeck AU - P E Crago AU - L S Kofman PY - 1988 DO - 10.1109/10.4579 UR - https://pubmed.ncbi.nlm.nih.gov/3209212/ ID - 3209212 ER -