@article{MZM_2008_84_5_a13,
     author = {A. V. Akopyan and A. S. Tarasov},
     title = {A {Constructive} {Proof} of {Kirszbraun's} {Theorem}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {781--784},
     publisher = {mathdoc},
     volume = {84},
     number = {5},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2008_84_5_a13/}
}