@article{10_4064_sm_45_1_43_48,
     author = {Andrew Vogt},
     title = {Maps which preserve equality of distance},
     journal = {Studia Mathematica},
     pages = {43--48},
     publisher = {mathdoc},
     volume = {45},
     number = {1},
     year = {1973},
     doi = {10.4064/sm-45-1-43-48},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-45-1-43-48/}
}