@article{VUU_2019_29_4_a1,
     author = {O. E. Galkin and S. Yu. Galkina},
     title = {Application of extreme sub- and epiarguments, convex and concave envelopes to search for global extrema},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {483--500},
     publisher = {mathdoc},
     volume = {29},
     number = {4},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2019_29_4_a1/}
}