Sousa Filho, L. F., Batista de Souza, J., Melo de Almeida, G. K., Couto Guedes de Jesus, I., & Diniz de Oliveira, E. (2017). Therapeutic ultrasound associated with copaiba oil reduces pain and improves range of motion in patients with knee osteoarthritis. Fisioterapia Em Movimento (Physical Therapy in Movement), 30(3). https://doi.org/10.1590/1980-5918.030.003.AO02