@article{JGG_2014_18_2_JGG_2014_18_2_a5,
     author = {P. Pech },
     title = {On a {3D} {Extension} of the {Simson-Wallace} {Theorem}},
     journal = {Journal for geometry and graphics},
     pages = {205--215},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {2014},
     url = {http://geodesic.mathdoc.fr/item/JGG_2014_18_2_JGG_2014_18_2_a5/}
}