1. Proceedings XXth Congress Ampere, Tallinn;Kjuntsel,1979
2. Stokes, H.T., Ailon, D.C. and Wong, C.H., as ref. 1, p. 134
3. NMR observations of molecular motions and Zeeman–quadrupole cross relaxation in 1,2‐difluorotetrachloroethanea)
4. Jurga, K., Jurga, S., Depireux, J. and Pajak, Z. as ref. 1, p. 127