@article{PORMA_1941__2_1_114575,
     author = {Mira Fernandes, A. de},
     title = {Um princ{\'\i}pio de velocidade m{\'\i}nima},
     journal = {Portugaliae mathematica},
     pages = {77--80},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {1941},
     mrnumber = {0004135},
     zbl = {0025.11106},
     language = {pt},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1941__2_1_114575/}
}