@article{10_4064_ba55_1_8,
     author = {Kinga Cudna-Salmanowicz and Jan Jak\'obowski},
     title = {Extending {Nearaffine} {Planes} to {Hyperbola} {Structures}},
     journal = {Bulletin of the Polish Academy of Sciences. Mathematics},
     pages = {71--80},
     publisher = {mathdoc},
     volume = {55},
     number = {1},
     year = {2007},
     doi = {10.4064/ba55-1-8},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ba55-1-8/}
}