Rolf Engelbrecht C. Hildebrand E. Jung G. Brenner R. Corcoy G. Eberhard C. Gapp G. Klepser Alberto de Leiva M. Massi-Benedetti R. Mechtler Klaus Piwernetz J. Sembritzki J. Thiery Smart Cards as Communication Tools in Health Information Systems. 541-548 1994 IFIP Congress (2) db/conf/ifip/ifip94-2.html#EngelbrechtHJBCEGKLMMPST94