Gwizdka
, Jacek, Cole, Michael ;
Kovács
, László, Fuhr, Norbert, Meghini, Carlo: Finding It on Google, Finding It on del.icio.us.. 4675. In:
ECDL
:
Springer
, 2007 (Lecture Notes in Computer Science). - ISBN 978-3-540-74850-2, S. 559-562