For citations:

Kashaev R.S., Suntsov I.A., Tung Ch.V., Kien N.T., Usachev A.E., Kozelkov O.V. EXPRESS-METHOD AND APPARATUS OF PROTON MAGNETIC RESONANCE RELAXOMETRY FOR MEASUREMENT OF DENSITY AND MOLECULAR MASS OF OILS. Zhurnal Prikladnoii Spektroskopii. 2019;86(2):277-282. (In Russ.)