| Author | Popularity |
|---|---|
| Boulain, N. | 3 |
| Merbold, L. | 3 |
| Archibald, S. | 2 |
| Ardö, Junas | 2 |
| Arneth, Almur | 2 |
| Brueggemann, N. | 2 |
| Bruemmer, C. | 2 |
| Cappelaere, Bernard | 2 |
| De Grandcourt, Agnès | 2 |
| El-Khidir, H.A.M. | 2 |
| El-Tahir, B.A. | 2 |
| Falk, U. | 2 |
| Kutsch, Werner L. | 2 |
| Muchinda, M. | 2 |
| Mukelabai, M.M. | 2 |
| Nouvellon, Yann | 2 |
| Ramier, D. | 2 |
| Scholes, Robert J. | 2 |
| Timouk, F. | 2 |
| Veenendaal, Elmar M. | 2 |
