@article{ELMA_1995__50_4_141584,
     author = {T. Tarnai and Zsolt G\'asp\'ar},
     title = {Covering a {Square} by {Equal} {Circles.}},
     journal = {Elemente der Mathematik},
     pages = {167--170},
     publisher = {mathdoc},
     volume = {50},
     number = {4},
     year = {1995},
     zbl = {0847.52018},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1995__50_4_141584/}
}