Knowledge creation and management : new challenges for managers. Oxford : Oxford University Press, 2007. xii, 323 s. Available on Internet: <http://www.loc.gov/catdir/enhancements/fy0724/2006040120-d.html> <http://www.gbv.de/dms/hbz/toc/ht014973117.pdf> ISBN 978-0-19-515962-2.