@article{JGG_2010_14_1_JGG_2010_14_1_a1,
     author = {J. K. Merikoski and T. Tossavainen },
     title = {Two {Approaches} to {Geometrography}},
     journal = {Journal for geometry and graphics},
     pages = {15--28},
     publisher = {mathdoc},
     volume = {14},
     number = {1},
     year = {2010},
     url = {http://geodesic.mathdoc.fr/item/JGG_2010_14_1_JGG_2010_14_1_a1/}
}