S. K. Dogan, S. Ay, and D. Evcik, “ The effectiveness of low laser therapy in subacromial impingement syndrome: a randomized placebo controlled double-blind prospective study ”, Clinics, vol. 65, no. 10, pp. 1019–1022, Jan. 2010, doi: 10.1590/S1807-59322010001000016.