@article{JGG_2002_6_1_a2,
     author = {M. Hlavova},
     title = {Two-Parametric {Motions} in the {Lobatchevski} {Plane}},
     journal = {Journal for geometry and graphics},
     pages = {027--036},
     year = {2002},
     volume = {6},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/JGG_2002_6_1_a2/}
}