Orlowski, K. ., F. . Eckardt, J. E. . Nusser, and K. . Witte. “FEEDBACK SYSTEM FOR PHYSIOTHERAPY AND POPULAR ATHLETES”. International Journal of Physiotherapy, vol. 5, no. 6, Dec. 2018, pp. 194-01, doi:10.15621/ijphy/2018/v5i6/178057.