| Europa League 1971/1972 - Appearances as Referee |  |
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| 03/11/1971 | FC Carl Zeiss Jena | - | OFK Beograd | 4:0 | - | - | - |
| 08/12/1971 | Željezničar Sarajevo | - | St. Johnstone FC | 5:1 | 1 | - | - |
| Europa League 1971/1972 - Appearances as Referee | |
|
|
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| 03/11/1971 | FC Carl Zeiss Jena | - | OFK Beograd | 4:0 | - | - | - |
| 08/12/1971 | Željezničar Sarajevo | - | St. Johnstone FC | 5:1 | 1 | - | - |
| Complete name: | Liuben Radunchev |
| Born: | 20/07/1931 |
| Place of birth: |
Bulgaria |
| Residence: | Sofia |
| Nationality: |
Bulgaria |