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- IJPER · Original Article
Alexandrina Dineva, Borislav Angelov, Magdalena Kondeva-Burdina, Maya Georgieva, Alexander Zlatkov
Volume 56, Issue 2 · pp. 546-552
- IJPER · Original Article
Vania Maslarska, Meri Amerikova, Ivanka Pencheva, Stanislav Bozhanov
Volume 54, Issue 2 · pp. 465-470
