О предельных ценностях

[bouzyges]

https://www.academia.edu/83494741/%D0%9C%D1%8B%D1%81%D0%BB%D0%B8_%D0%BE_%D1%82%D0%B5%D0%BE%D1%80%D0%B8%D0%B8_%D1%81%D0%BF%D0%B8%D1%81%D0%BA%D0%B0_