@article{10_4153_S0008439520000314,
     author = {Azagra, Daniel and Gruyer, Erwan Le and Mudarra, Carlos},
     title = {Kirszbraun{\textquoteright}s {Theorem} via an {Explicit} {Formula}},
     journal = {Canadian mathematical bulletin},
     pages = {142--153},
     year = {2021},
     volume = {64},
     number = {1},
     doi = {10.4153/S0008439520000314},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439520000314/}
}