1. Ellis, K.J.: The lanthanide elements in biochemistry, biology and medicine. Inorganic Perspectives in Biology and Medicine 1: 101–135, 1977.
2. Evans, C.H.: Past, present, and possible future clinical applications of the lanthanides. Chapter 9, in Biochemistry of the Lanthanides, (Evans, C.H.) pp. 391–425, Plenum Press, New York, 1990.
3. Simpson, J.Y: Note on the therapeutic action of the salts of cerium. Monthly Journal of Medicine p. 564, 1854.
4. Simpson, J.Y. Clinical lectures on the diseases of women. Lecture XXII On spurious pregnancy–its prognosis, pathology and treatment. Medical Times and Gazette 40: 277–281, 1859.
5. Lee, C. On the therapeutical use of the oxalate of cerium. American Journal of the Medical Sciences 40: 391–394, 1860.