TY - JOUR AU - Editorial Office PY - 2019/06/30 Y2 - 2024/03/29 TI - ESJ June COVER PAGE JF - European Scientific Journal, ESJ JA - ESJ VL - 15 IS - 17 SE - Articles DO - UR - https://eujournal.org/index.php/esj/article/view/12144 AB - , ER -