@article{GDZPPN000366455, title = {Unit Squares Intersecting All Secants of a Square.}, journal = {Discrete \& computational geometry}, volume = {11}, year = {1994}, pages = {235-240}, zbl = {0799.52015}, url = {http://dml.mathdoc.fr/item/GDZPPN000366455} }
Valtr, Pavel. Unit Squares Intersecting All Secants of a Square.. Discrete & computational geometry, Tome 11 (1994) pp. 235-240. http://gdmltest.u-ga.fr/item/GDZPPN000366455/