I. YAKOVLEV CHUVASH STATE PEDAGOGICAL UNIVERSITY BULLETIN

-​ originality of work and no plagiarism. By submitting a manuscript to, the author(s) warrant that the manuscript is their own original work and that it has neither been published previously nor is currently being considered for publication elsewhere. They also warrant that the sources of any ideas and/or words in the manuscript that are not their own have been properly attributed through appropriate citations and/or quotes;

-​ information veracity and accuracy. The research results in a manuscript must veracious and accurate, there must be no false statements or erroneous data;

-​ authorship. Only those individuals who have made a substantive contribution should be listed as authors (to those whose contributions are indirect or marginal acknowledgments should be expressed). Authors’ names should be listed in the article in order of their contribution to the article, and all authors take responsibility for their own contributions. The corresponding author must ensure that all appropriate co-authors and no inappropriate co-authors are included on the article, and that all listed co-authors have seen and approved the final version of the article and agreed to its publication. The corresponding author must ensure that all listed co-authors have seen and approved the final version of the article and agreed to its publication;

-​ consideration of conflict of interest. Authors should reveal any financial or any other significant conflict of interest that could be interpreted as a contributing factor of the research results. All sources of financial support for the research should be disclosed in the manuscript (data on grants, other sources of financial support and other forms of support);

-​ correction of errors. Where an author discovers a significant error or inaccuracy in an article of his/hers that has been published in the journal, he/she has an obligation to promptly notify the editors and cooperate with them to correct the article or retract it as appropriate.