Babenko, V.F. and Borodachov, S. (1999) “Optimization of approximate integration of monotone functions of two variables”,
Ukrains’kyi Matematychnyi Zhurnal, 51(7), pp. 881–889. Available at:
https://umj.imath.kiev.ua/index.php/umj/article/view/4677 (Accessed: 10 April 2025).