Author

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Jozef Obona
University of Prešov, Prešov, Slovakia
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5 articles by this author

 12-08-2019
 Unique: 281  |  Total: 377
 49-53
 09-07-2019
 Unique: 534  |  Total: 698
 129-152
 21-11-2018
 Unique: 625  |  Total: 950
 109-133
 23-08-2017
 Unique: 894  |  Total: 1455
 109-128
 27-04-2016
 Unique: 1159  |  Total: 2057
 125-142