John Burns Heather J. Ruskin A Model of Immune Suppression and Repertoire Evolution. 75-84 2003 conf/iccS/2003-1 International Conference on Computational Science http://link.springer.de/link/service/series/0558/bibs/2657/26570075.htm db/conf/iccS/iccS2003-1.html#BurnsR03