“PETKO: Pilates Exercise Training before Knee Arthroplasty in Patients With Osteoarthritis A Two-Arm, Randomized, Open-Label Assessor Blinded Phase II Clinical Trial”.
Principles and Practice of Clinical Research, vol. 2, no. 2, Nov. 2016,
https://journal.ppcr.org/index.php/ppcrjournal/article/view/34.