Calvo, F., Murayama, N., Justus Doczi, R., Ondarza Robira, R. y García López, S. 2017. Comparative study of bond strength of tubes bonded to a resin surface on the buccal aspect of molars using Empress Direct resin and Transbond XT resin: an ex vivo study. Revista Mexicana de Ortodoncia. 5, 3 (oct. 2017). DOI:https://doi.org/10.1016/j.rmo.2017.12.009.