@article{10_4064_ap_56_3_303_309,
     author = {B. Chalmers and F. Metcalf},
     title = {A simple formula showing {L{\textonesuperior}} is a maximal overspace for two-dimensional real spaces},
     journal = {Annales Polonici Mathematici},
     pages = {303--309},
     publisher = {mathdoc},
     volume = {56},
     number = {3},
     year = {1991},
     doi = {10.4064/ap-56-3-303-309},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-56-3-303-309/}
}