To the article “Properties of Base Oils from Heavy Crudes and Native Bitumens of Permmian Deposits of Tatarstan as Function of Degree of Their Natural Metamorphosis,” by G. P. Kayukova, S. A. Petrov, and G. V. Romanov, Vol. 50, No. 2, pp. 124-134, May, 2014

The name of the second author should read S. M. Petrov instead of S. A. Petrov. The Editorial Board apologizes for the error.

The correct affiliation for the first and third authors is A. E. Arbuzov Institute of Organic and Physical Chemistry (IOPC), Kazan’.