Tokmagambetov, N.S., and B.K. Tolegen. “Q-Analogues of Lyapunov-Type Inequalities Involving Riemann–Liouville Fractional Derivatives”. Bulletin of the Karaganda University. Mathematics Series, vol. 119, no. 3, Sept. 2025, pp. 214-30, doi:10.31489/2025m3/214-230.