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 | 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) |