@article{MZM_1968_4_4_a7,
     author = {D. B. Potyagailo},
     title = {A class of half-strip pasting functions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {443--451},
     year = {1968},
     volume = {4},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1968_4_4_a7/}
}