Putriwijaya, Fiory Dioptis, Titiek Berniyanti, and Indeswati Diyatri. 2016. “Correlation Between Working Positions and Lactic Acid Levels With Musculoskeletal Complaints Among Dentists”. Dental Journal 49 (4):201-5. https://doi.org/10.20473/j.djmkg.v49.i4.p201-205.