7Szalavetz A. Tertiarization of manufacturing industry in the new economy: experiences in hungarian companies [ R] . Hungarian Academy of Sciences Working Papers, 2003 : 10 - 12.
8Vandermerwe S, Rada J. Servitization of business : add- ing value by adding services [ J ] . European Manage- ment Journal, 1988, 6 (4): 314-324.