@article{NUMA_1987__52_5_133247,
     author = {A. Guessab},
     title = {Numerical {Curvature} {Formulae} with {Preassigned} {Knots.}},
     journal = {Numerische Mathematik},
     pages = {467--478},
     publisher = {mathdoc},
     volume = {52},
     number = {5},
     year = {1987},
     zbl = {0652.41009},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1987__52_5_133247/}
}