1. Drucker, P.F. (1983), “Modern prophets, schumpeter or keynes”,Forbes, May 23, available at: www.peterdrucker.at (accessed January 2009).
2. Einstein, A. (1916), “Ernst Mach”,Physikalische Zeitschrift, Vol. 17 No. 7, pp. 101‐104, April 1.
3. From inspired teaching to effective knowledge work and back again
4. Fischbach, J., Lee, J. and Siemsen, H. (2012), “Was Projektmanager von Parties lernen können”,Projekt Magazin, Vol. 15, available at: www.projektmagazin.de/ausgaben/2012.
5. Kantrow, A.M. (1980), “Why read Peter Drucker”,HBR, January‐February, available at: http://hbr.org/2009/11/why‐read‐peter‐drucker/ar/1.