Markanin, G.S., and A.Sh. Malkhasyan. “GENERAL SOLUTION OF QUADRATIC EQUATIONS IN FREE GROUPS”. Proceedings of the YSU A: Physical and Mathematical Sciences 49, no. 2 (237) (June 12, 2015): 62–65. Accessed November 25, 2024. https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol49_no2_2015_pp062-065.