Gordić, Snežana, Bojan Lazić, and Marina Milošević. 2022. “Historical Genesis of the Concept of Number and Number Systems - Possibilities of Application in the Initial Teaching of Mathematics (II): Introduction, History of Mathematics and Teaching Mathematics, Possibilities of Applying the ‘history’ of Numbers in the Teaching of Mathematics, Examples of Tasks, Conclusion, References”. Norma 27 (2): 227-35. https://doi.org/10.5937/norma27-38117.