1. Kyuntsel, I.A.; Gordeev, A.D.; Tsimmerman, S.I.:Koord Khim 3(1977),1035
2. Svergun, V.I.; Borisov, A.E.; Novikova, N.V.; Babushkina, T.A.; Bryukhova, E.V.; Semin, G.K.:Izv Akad Nauk SSSR Ser Khim (1970),484
3. NQR Group of INEOS AN SSSR:Nuclear Quadrupole Resonance In Chemistry (G.K. Semin et al., English Edition, John Wiley & Sons (1975),465
4. Gordeef, A.D.; Kyuntsel, I.A.:Zh Strukt Khim 15(1974),935
5. Dewar, M.J.S.; Patterson, D.B.; Simpson, W.I.:J Chem Soc Dalton Trans (1973),2381