TY - RPRT TI - Myofibril and sarcoplasmic reticulum changes during muscle development: activity vs inactivity. AU - A N Belcastro PY - 1987 DO - 10.1016/0020-711x(87)90176-5 UR - https://pubmed.ncbi.nlm.nih.gov/2822503/ ID - 2822503 ER -