| Verfasser | Häufigkeit |
| Petkov, Krăstʹo Iliev 1943- |
16 |
| Iliev, Konstantin N. 1924-1988 |
12 |
| Iliev, Krasimir 1954- |
12 |
| Conev, Kiril Iliev 1896-1961 |
7 |
| Iliev, Konstantin |
7 |
| Fileva, Adelina 1958- |
5 |
| Iliev, Konstantin 1937- |
5 |
| Vladikov, Atanas |
4 |
| Iliev, Adrian |
3 |
| Iliev, Ilja K. |
3 |
| Kacarov, Gavril Iliev |
3 |
| Lichardus, Jan 1939-2004 |
3 |
| Thirkell, John E. M. 1934- |
3 |
| Christov, Christo J. |
2 |
| Echt, Rudolf 1950- |
2 |
| Grigorova, Vanja 1978- |
2 |
| Iliev, Petkan |
2 |
| Vladikov, Atanas I. |
2 |
| Astriab, Jan 1937-2005 |
1 |
| Bakardzhiev, Stefan 19XX- |
1 |