@article{article129c2f20,
title   = {Influence of initial occlusal severity on time and efficiency of class I malocclusion treatment carried out with and without premolar extractions},
author = {Leon-Salazar, Ruben and Janson, Guilherme and Henriques, José Fernando Castanha and Leon-Salazar, Vladimir},
year = {2014},
doi = {10.1590/2176-9451.19.4.038-049.oar},
journal   = {Dental Press Journal of Orthodontics}
}