SLOW HINDERED ROTATION OF CF3 GROUP IN RADICAL ANION OF ORTHO NITROBENZOTRIFLUORIDE IN N,N′-DIMETHYLFORMAMIDE AND RECONSTRUCTION OF EPR SPECTRUM Статья Polenov E.A., Shundrin L.A., Melnikov P.V., Bozhenko K.V. Bulletin of the Russian Academy of Sciences: Physics. Том 70. 2006. С. 1268-1273