Linek P. Could changes in the ultrasound image of the muscles of the lateral abdominal wall be seen as a sign of muscle activity? A narrative review. Eur J Clin Exp Med [Internet]. 2017 Mar. 31 [cited 2026 Feb. 2];15(1):59–65. Available from: https://journals.ur.edu.pl/ejcem/article/view/11650