Nahsan, F. P. S., V. L. Schmit, F. S. Naufel, A. L. Faria e Silva, and L. P. Chaves. “Thirteen-Year Follow up of a Conservative Approach for Closing Diastema in Anterior Teeth With Composite Resin”. Bioscience Journal, vol. 31, no. 4, June 2015, pp. 1291-5, doi:10.14393/BJ-v31n4a2015-29543.