Nugmanova, G.N., and Zh.M. Sagidullayeva. “Generalized Spin Model With Vector Potential and Its Solution”. Bulletin of the Karaganda University. Mathematics Series 86, no. 2 (June 30, 2017): 91–96. Accessed December 8, 2025. https://mts.buketov.edu.kz/mathematics-vestnik/article/view/166.