@article{JGG_2021_25_1_JGG_2021_25_1_a4, author = {Ch. van Tienhoven and D. Pellegrinetti }, title = {Quadrigon {Geometry:} {Circumscribed} {Squares} and {Van} {Aubel} {Points}}, journal = {Journal for geometry and graphics}, pages = {53--59}, publisher = {mathdoc}, volume = {25}, number = {1}, year = {2021}, url = {http://geodesic.mathdoc.fr/item/JGG_2021_25_1_JGG_2021_25_1_a4/} }