@article{VUU_2017_27_1_a1,
     author = {O. E. Galkin and S. Yu. Galkina},
     title = {Global extrema of the {Gray} {Takagi} function of {Kobayashi} and binary digital sums},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {17--25},
     year = {2017},
     volume = {27},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2017_27_1_a1/}
}