%0 Journal Article %A Emilija Nešović %T Hyperbolic angle function in the Lorentzian plane %J Kragujevac Journal of Mathematics %D 2005 %P 139 %V 28 %I mathdoc %U http://geodesic.mathdoc.fr/item/KJM_2005_28_a9/ %G en %F KJM_2005_28_a9