Hlynsky Y.М. and Panchyshyn, Y.Y. (1995) “On the monotonicity and constancy of signs of some rational explicit methods for nonlinear systems of ordinary differential equations”, Ukrains’kyi Matematychnyi Zhurnal, 47(6), pp. 848–852. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5477 (Accessed: 6 December 2025).