@article{JGG_2017_21_1_JGG_2017_21_1_a4,
     author = {F. Laudano and G. Vincenzi },
     title = {Congruence {Theorems} for {Quadrilaterals}},
     journal = {Journal for geometry and graphics},
     pages = {45--59},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {2017},
     url = {http://geodesic.mathdoc.fr/item/JGG_2017_21_1_JGG_2017_21_1_a4/}
}