Dragidella, A., M. Jankullovska, X. Aliu, and D. Stubljar. “The Efficacy of Erbium Laser in Infected Root Canals: Ex Vivo Study”. European Scientific Journal, ESJ, Vol. 13, no. 30, Oct. 2017, p. 453, doi:10.19044/esj.2017.v13n30p453.