Amalina, N. and Setiawati, E. 2021. Effectiveness of Deep Cervical Flexor (DCF) Exercise on Neck Functional Scores in Helicopter Crew with Mechanical Neck Pain. Surabaya Physical Medicine and Rehabilitation Journal. 3, 2 (Aug. 2021), 71–76. DOI:https://doi.org/10.20473/spmrj.v3i2.24272.