Zevallos-Quiroz, C. A., I. E. Perez, and C. R. Garcia-Rupaya. “Efficacy of Controlled Memory and Shape Memory Nickel Titanium Instruments in Removing Filling Material from Severely Curved Root Canals: An Ex Vivo Study”. Iranian Endodontic Journal, vol. 14, no. 2, May 2019, pp. 115-21, doi:10.22037/iej.v14i2.23644.