Polyanskaya, Ekaterina N., Nataliya M. Rumyantseva, and Alexander M. Tyutchenko. 2019. “Value Orientation of Russian and Greek Youth: Similarities and Differences of Concept Spheres”. Amazonia Investiga 8 (19):572-77. https://amazoniainvestiga.info/index.php/amazonia/article/view/271.