Imanbaev, N.S., and Ye. Kurmysh. 2021. “On Zeros of an Entire Function Coinciding With Exponential Typequasi-Polynomials, Associated With a Regular Third-Order Differential Operator on an Interval”. Bulletin of the Karaganda University. Mathematics Series 103 (3):44-53. https://doi.org/10.31489/2021m3/44-53.