1. Trepanier, R.J.; Whitehead, M.A.:Z Naturforsch 41a(1986),386
2. Grechishkin, V.S.; Anferor, V.P.; Sinjavsky, N.Ja.:Adv Nucl Quadrupole Reson 5(1983),1
3. Anferov, V.A.; Anferova, S.V.; Grechishkin, V.S.; Mikhal'kov, V.M.:Zh Fiz Khim 56(1982),2275
4. Murgich, J.; Santana, R.M.; Diaz, O.E.:J Magn Reson 51(1983),26
5. Dresvyankin, B.V.; Grechishkin, V.S.; Balicheva, T.G.; Pologikh, I.V.:Teor Eksp Khim 11(1975),276