| Title | Триод |
| Publication Type | Book Chapter |
| Year of Publication | 2003 |
| Authors | Попов, Г |
| Book Title | Кирило-Методиевска енциклопедия |
| Volume | 4 |
| Pagination | 169–178 |
| Publisher | БАН |
| City | София |
| Citation Key | Попов2003a |
| Title | Триод |
| Publication Type | Book Chapter |
| Year of Publication | 2003 |
| Authors | Попов, Г |
| Book Title | Кирило-Методиевска енциклопедия |
| Volume | 4 |
| Pagination | 169–178 |
| Publisher | БАН |
| City | София |
| Citation Key | Попов2003a |