@article{pithon_2013,  title={Importance of the control group in scientific research},  volume={18},  ISSN={2176-9451},  url={https://doi.org/10.1590/S2176-94512013000600003},  DOI={10.1590/S2176-94512013000600003},  number={6},  journal={Dental Press Journal of Orthodontics},  publisher={Dental Press International},  author={Pithon, Matheus Melo},  year={2013},  month={Nov},  pages={13–14} }