Kehayova-Stoycheva, Maria Petrova, Vasilev, Julian Andreev Measuring the Problem use of Internet - Internal Structures and Dependences,
Knowledge and Business, 2018, pp. 6 - 26, ISSN 2367-7791.
Kehayova-Stoycheva, Maria Petrova, Vasilev, Julian Andreev .
Measuring the Problem use of Internet - Internal Structures and Dependences.
Varna: Knowledge and Business, 2018, pp. 6 - 26, ISSN 2367-7791.
Kehayova-Stoycheva, Maria Petrova, Vasilev, Julian Andreev (2018)
Measuring the Problem use of Internet - Internal Structures and Dependences,
Varna: Knowledge and Business, pp. 6 - 26, ISSN 2367-7791
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