@article{AMBP_2017__24_1_115_0,
     author = {Miyachi, Hideki and Ohshika, Ken{\textquoteright}ichi},
     title = {Une formule diff\'erentielle de la longueur extr\'emale et ses applications},
     journal = {Annales math\'ematiques Blaise Pascal},
     pages = {115--133},
     publisher = {Annales math\'ematiques Blaise Pascal},
     volume = {24},
     number = {1},
     year = {2017},
     doi = {10.5802/ambp.366},
     language = {fr},
     url = {http://www.numdam.org/articles/10.5802/ambp.366/}
}