Kaul, R. et al. 2014. Comparative Evaluation of Physical Surface Changes and Incidence of Separation in Rotary Nickel-Titanium Instruments: An in Vitro SEM Study. Iranian Endodontic Journal. 9, 3 (Jun. 2014), 204–209. DOI:https://doi.org/10.22037/iej.v9i3.4970.