C. K. Nabeshima, G. H. R. Martins, M. F. de P. Leonardo, R. C. F. Shin, S. Cai, and M. E. de L. Machado, “Comparison of three obturation techniques with regard to bacterial leakage”, Braz. J. Oral Sci., vol. 12, no. 3, pp. 212–215, Oct. 2015.