Rahayu Feblina, A., A. Irawaty Djais, A. Mardiana, A. Annisa, and N. Hamrun. “Aesthetic Crown Lengthening Using Chu Proportion Gauges: A Case Report”. KnE Medicine, Vol. 2, no. 1, Apr. 2022, pp. 122-30, doi:10.18502/kme.v2i1.10843.