@article{JGG_2017_21_1_JGG_2017_21_1_a5,
     author = {V. Oxman and A. Sigler and M. Stupel },
     title = {On the {Invariance} of {Brocard} {Angles} in the {Interior} and {Exterior} {Pappus} {Triangles} of any {Given} {Triangle}},
     journal = {Journal for geometry and graphics},
     pages = {61--7},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {2017},
     url = {http://geodesic.mathdoc.fr/item/JGG_2017_21_1_JGG_2017_21_1_a5/}
}