|  |  | 
| 2007 | ||
|---|---|---|
| 1 | EE | Plamena Andreeva, Plamen Andreev, Maya Dimitrova, Petia Radeva: A refinement model with information granulation focused on difficult to distinguish cases. CompSysTech 2007: 47 | 
| 1 | Plamena Andreeva | [1] | 
| 2 | Maya Dimitrova | [1] | 
| 3 | Petia Radeva (Petia Radeva Ivanova) | [1] |