@article{05281563, title = {Cyclic quadrangles from squares.}, journal = {Annales Mathematicae et Informaticae}, volume = {33}, year = {2006}, pages = {23-34}, zbl = {1135.51315}, language = {en}, url = {http://dml.mathdoc.fr/item/05281563} }
Čerin, Zvonko; Gianella, Gian Mario. Cyclic quadrangles from squares.. Annales Mathematicae et Informaticae, Tome 33 (2006) pp. 23-34. http://gdmltest.u-ga.fr/item/05281563/