For citations:

Kаshaev R.S., Kien N.C., Тung T.V., Kоzelkov О.V. EXPRESS-METHODS OF PMR-RELAXOMETRY FOR DETERMINATION OF VISCOSITY AND CONCENTRATION OF ASPHALTENES IN OILS. Zhurnal Prikladnoii Spektroskopii. 2019;86(5):807-812. (In Russ.)