1. H.D. Beckey Principles of fie Id de sorption mass spectrometry. Pergamon Press, Oxford (1977).
2. M. Barber, R.S. Bordoli, R.S.Sedgwick, A.N. Tyler, Chem. Soc Chem. Commun. 325(1981).
3. R.D. Macfarlane, F.D. Torgerson, Science 109, 920 (1976).
4. C.R. Blakely, J.J. Carmody, M.L. Vestal, Anal Chem. 52, 1636 (1980).
5. C.M. Whitehouse, R.N. Dreyer, M. Yamashita, J.B. Fenn Mal. Chem. 57, 675 (1985).