1. Atteslander, P. (2003). Methoden der empirischen Sozialforschung (10th edition). Berlin: De Gruyter Studienbuch [in German].
2. Bernshtein, S. (1912). Istoricheskiy obzor razvitiya ponyatiya o funktsii [Historical overview of the development of the concept of function]. Vestnik opyitnoy fiziki i elementarnoy matematiki – Bulletin of Experimental Physics and Elementary Mathematics, (559), 177–184. Retrieved from https://www.vofem.ru/ru/articles/55901/ [in Russian].
3. Bobynin, V. V. (1910). Estestvennyie i iskusstvennyie puti vosstanovleniya istorikami matematiki drevnih dokazatelstv i vyivodov [Natural and artificial ways of restoration by historians of mathematics of ancient proofs and conclusions]. Vestnik opyitnoy fiziki i elementarnoy matematiki – Bulletin of Experimental Physics and Elementary Mathematics, (515), 277–281. Retrieved from https://www.vofem.ru/ru/articles/51503/ [in Russian].
4. Chistyakov, I. I. (1912). K reforme prepodavaniya matematiki v sredney shkole. V. Elementyi teorii chisel v sredney shkole [To reform the teaching of mathematics in secondary school. V. Elements of number theory in secondary school]. Vestnik opyitnoy fiziki i elementarnoy matematiki – Bulletin of Experimental Physics and Elementary Mathematics, (567), 80–86. Retrieved from https://www.vofem.ru/ru/articles/56703/ [in Russian].
5. Dahiya, S. A. (1956). “Zhurnal elementarnoj matematiki” [“Journal of Elementary Mathematics”]. Istoriko-matematicheskie issledovaniya – Historical and mathematical research, (9), 537–612. Retrieved from http://pyrkov-professor.ru/default.aspx?tabid=195&ArticleId=47 [in Russian].