@article{10_4064_cm7167s_3_2017,
     author = {Karina Olszak and Zbigniew Olszak},
     title = {The equi-affine and {Frenet} curvatures of curves in {pseudo-Riemannian} 2-manifolds},
     journal = {Colloquium Mathematicum},
     pages = {103--112},
     publisher = {mathdoc},
     volume = {150},
     number = {1},
     year = {2017},
     doi = {10.4064/cm7167s-3-2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm7167s-3-2017/}
}