Introduction
Authors:
Krasimira
Mutafova
Stela
Dermendzhieva
St. Cyril and St. Methodius University of Veliko Tarnovo, Bulgaria
Tsenka
Ivanova
Pages:
25-
35
Abstract:
Keywords:
Download
904 downloads since 13.7.2017 г.
NA
/
Albania
/
Bulgaria
/
China
/
Cote D'Ivoire
/
Croatia
/
Cyprus
/
Europe
/
France
/
Germany
/
Greece
/
India
/
Iraq
/
Portugal
/
Romania
/
Russian Federation
/
Serbia
/
Sweden
/
Switzerland
/
Turkey
/
Ukraine
/
United Kingdom
/
United States