Ambler, E.; Grace, M. A.; Halban, H.; Kurti, N.; Durand, H.; Johnson, C. E.; Lemmer, H. R. (1953). “Nuclear polarization of cobalt 60”. 《The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science》 44 (349): 216–218. doi:10.1080/14786440208520296.