| |
| 2000 | ||
|---|---|---|
| 4 | Lyubomir Ivanov: Platek Spaces. Fundam. Inform. 44(1-2): 145-181 (2000) | |
| 3 | Lyubomir Ivanov: Boldface Recursion on Platek Spaces. Fundam. Inform. 44(1-2): 183-208 (2000) | |
| 1990 | ||
| 2 | Lyubomir Ivanov: Operative vs. Combinatory Spaces. J. Symb. Log. 55(2): 561-572 (1990) | |
| 1989 | ||
| 1 | Lyubomir Ivanov: Abstract Hierarchies and Degrees. J. Symb. Log. 54(1): 16-25 (1989) | |