On nuclear magnetic resonance in solids: B. N. Provotorov, Optics & Spectrosc., 11 (1), July 1961, 63–65Vacuum1962PDF17 KB
Transient Decay of Longitudinal Magnetization in Heterogeneous Spin Systems under Selective Saturation. IV. Reformulation of the Spin-Bath-Model Equations by the Redfield-Provotorov TheoryYeung · Journal of Magnetic Resonance Series A1994PDF626 KB