| 1. |
Management Science
1994 : FEB, VOL. 40:2, p. 227-251
|
1994 |
Cohen, W.
Levinthal, D.
|
|
| 2. |
Online
1996 : 4, p. 79-80
|
1996 |
Jaspersen, Thomas
Mielenz, Michael
Himstedt, Thomas
|
|
| 3. |
Ecological Economics
2000 : JAN, VOL. 32:1, p. 9-14
|
2000 |
Putz, F.
|
|
| 4. |
Business 2.0
2003 : AUG, VOL. 4:7, p. 88-95
|
2003 |
Schonfeld, E.
Malik, O.
|
|
