@article{JGG_2021_25_1_JGG_2021_25_1_a1,
     author = {J. Siegele and M. Pfurner and H.-P. Schr\"ocker },
     title = {Space {Kinematics} and {Projective} {Differential} {Geometry} {Over} the {Ring} of {Dual} {Numbers}},
     journal = {Journal for geometry and graphics},
     pages = {19--31},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {2021},
     url = {http://geodesic.mathdoc.fr/item/JGG_2021_25_1_JGG_2021_25_1_a1/}
}