1 “..., however, reveal Professor Puu as having a very well developed mathematical mind (…). Similarly, his...”

2 “... by Professor William Hendon, Editor of the Journal of C- tural Economics. In my capacity of chairman...”

3 “... been concerned the last years. It grew out from the joint work by Professor Martin Beckmann...”

4 “... been concerned the last years. It grew out from the joint work by Professor Martin Beckmann...”

5 “... the last years. It grew out from the joint work by Professor Martin Beckmann and the present author...”

6 “... edition, was the joint work of the author with Professor Martin J. Beckmann, documented in two co-authored...”