1. Toward the new organization;Drucker;Executive Excellence,1997
2. R. Cooper, R. Slagmulder, Target Costing and Value Engineering, The IMA Foundation for Applied Research Inc., Productivity Press, Portland, 1997, 379pp.
3. MET. Year Book 1999 – Metals, Engineering and Electronics Industry, Metalliteollisuuden keskusliitto. Suomen Painotuote Oy, Helsinki, 52pp. (in Finnish).
4. M. Hannula, Expedient total productivity measurement, Doctoral Thesis, Tampere University of Technology, Industrial Engineering and Management, Acta Polytechnica Scandinavica, IM1, Espoo, 1999, 179pp.
5. B.J. Van Loggerenberg, S.J. Cucchiaro, Productivity measurement and the bottom line, National Productivity Review (1981–1982) 87–99.