Petroshchuk, N. R. “SYSTEM OF INCRESING QUALIFICATION OF TEACHERS FOR PUBLIC SCHOOLS IN UKRAINE AT THE END OF XIX CENTURY – AT THE BEGINNING OF XX CENTURY: THE HISTORIOGRAPHY OF THE PROBLEM”. Educological Discourse, no. 1 (5), Mar. 2014, pp. 182-93, https://od.kubg.edu.ua/index.php/journal/article/view/97.