Rahmawati, A. D., I. Ahmad, and A. S. Setyawan. “The Role of Cervical Vertebrae Maturation in Defining the Chronological Age of Down Syndrome Children”. Dental Journal, vol. 50, no. 4, Dec. 2017, pp. 220-5, doi:10.20473/j.djmkg.v50.i4.p220-225.