G. Raidl, A Chwatal:
"Fingerprint template compression by solving a minimum label $k$-node subtree problem";
Talk: International Conference of Numerical Analysis and Applied Mathematics (ICNAAM), Korfu, Griechenland; 2007-09-16 - 2007-09-20; in: "International Conference of Numerical Analysis and Applied Mathematics", (2007), ISBN: 978-0-7354-0447-2; 444 - 447.