A patent-based cartography of technology
| Year of publication: |
1994
|
|---|---|
| Authors: | Engelsman, E. C. ; van Raan, A. F. J. |
| Published in: |
Research Policy. - Elsevier, ISSN 0048-7333. - Vol. 23.1994, 1, p. 1-26
|
| Publisher: |
Elsevier |