1
by Welfens, Paul J. J., Addison, John T., Audretsch, David B., Gries, Thomas
Published 1999
Springer Berlin Heidelberg

3
by Welfens, Paul J. J.
Published 1994
Springer Berlin Heidelberg

4
by Welfens, Paul J. J.
Published 1999
Springer Berlin Heidelberg

6
by Welfens, Paul J. J.
Published 2001
Springer Berlin Heidelberg

7
by Welfens, Paul J. J.
Published 1996
Springer Berlin Heidelberg