Giorgadze, L., D. Alibiev, G. De Chirico, and A.Sh. Kazhikenova. 2017. “Minimization of Product Defects by the Means of Implementing Correct Test Pyramid in the Software Development Process”. Bulletin of the Karaganda University. Mathematics Series 88 (4):8-14. https://doi.org/10.31489/2017m4/8-14.