Aktaş, Mustafa Fahri, and Başak Ecem Bingül. “Lyapunov-Type Inequalities for a Nonlinear System Including Operators”. Ukrains’kyi Matematychnyi Zhurnal, vol. 76, no. 4, Apr. 2024, pp. 475-86, https://doi.org/10.3842/umzh.v74i4.7374.