@article{10_21136_CPMF_1948_123121,
     author = {Urban, Alois},
     title = {Note on the {T.} {Y.} {Thomas's} {Paper:} {On} the projective theory of two dimensional {Riemann} spaces},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {89--92},
     publisher = {mathdoc},
     volume = {73},
     number = {3},
     year = {1948},
     doi = {10.21136/CPMF.1948.123121},
     mrnumber = {0028089},
     zbl = {0034.10002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1948.123121/}
}