Parvathaneni, K. P., Goel, B. R. and Parvathaneni, B. D. (2010) “A comparison of root canal preparations using stainless steel, Ni-Ti hand, and Ni-Ti engine-driven endodontic instruments – an in vitro study”, Bangladesh Journal of Medical Science, 9(4), pp. 223–230. doi: 10.3329/bjms.v9i4.6689.