@article{10_14708_ma_v18i32_1741,
     author = {Micha{\l} H. Rudowski},
     title = {On distance in spaces with regular n-directional metrics},
     journal = {Mathematica Applicanda},
     pages = { 103--116},
     publisher = {mathdoc},
     volume = {18},
     number = {32},
     year = {1990},
     doi = {10.14708/ma.v18i32.1741},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/ma.v18i32.1741/}
}