1. Proton-induced X-ray analysis of steel surfaces for microprobe purposes
2. H. J. M. Bowen , 1966 , Trace Elements in Biochemistry , Academic Press, Inc. (London) Ltd.p.16 .
3. X-ray analysis: Elemental trace analysis at the 10−12 g level
4. T. B. Johansson, R. Akselsson, S. A. E. Johansson, K. F. J. Heinrich, C. S. Barrett, J. B. Newkirk, and C. O. Ruud , 1972 , Advances in X-ray Analysis , vol. 15 , p. 373 , New York, Plenum Press.