@article{arfianti_artiningsih_nazar_2020,  title={Variations in the Cross-Sectional Shape of the Apical Thirds of the Root Canals in Maxillary and Mandibular Teeth},  volume={20},  ISSN={1983-4632},  url={https://doi.org/10.1590/pboci.2020.142},  DOI={10.1590/pboci.2020.142},  journal={Pesquisa Brasileira em Odontopediatria e Clínica Integrada},  publisher={Associação de Apoio à Pesquisa em Saúde Bucal},  author={Arfianti, Rizky Putri and Artiningsih, Dewa Ayu Nyoman Putri and Nazar, Kamizar},  year={2020},  pages={e5696} }