Axelsson J, Hakansson K, Palmblad M, Hakansson P
Ion Physics Division, Angstrom Laboratory, Uppsala University, Box 534, S-751 21 Uppsala, Sweden.
Rapid Commun Mass Spectrom. 1999;13(14):1550. doi: 10.1002/(SICI)1097-0231(19990730)13:14<1550::AID-RCM651>3.0.CO;2-O.