1. (a) in : NMR and the Periodic Table, Academic Press, New York, 1978, p. 183;
2. Calcium and Magnesium NMR in Chemistry and Biology
3. (d) A broad 25Mg-NMR signal for ethylmagnesium halides has been observed: in Handbook of High Resolution Multinuclear NMR, Wiley, New York, 1982, p. 96.