1. M.A. Bader, Intellectual property management in R&D collaborations. The case of the service industry sector. Heidelberg: Physica, 2006, pp.3-10.
2. H. Ernst, Patent information for strategic technology management. Word Patent Inf. 25 (2003) 233-242.
3. E. Zahn, Object and purpose of technology management. Hanboook of Tehnological Management (in German). Schaffer-Poeschel Verlag, Stuttgart, (1995).
4. T. Wilmer, Can protect ideas?, Introduction with examples (in German), dtv, München, 2006, pp.20-25.
5. E. Häußer, Natural sciences (in German). 73, 5 (1986) 234-238.