(2-2019)
(3-2019)
(12-2018)
(4-2018)
(3-2018)
(3-2017)
(2-2016)
First International Conference on Educational Theory and Research certificate of attendance ,    (2-2016)
(2-2016)
(2-2015)
The European Languages Certificates   (4-2014)
(5-2012)
(9-2007)