Wang, G. W., Weedon, B. R., Meier, M. S., Saunders, M., & Cross, R. J. (2000). 3He NMR study of (3)He@C(60)H(6) and (3)He@C(70)H(2)(-)(10). Organic Letters, 2(15), 2241-3. https://doi.org/10.1021/ol006116h (Original work published 2000)