@article{DCG_1989__4_6_131077,
     author = {R. Hayward},
     title = {A {Note} on the {Circle} {Containment} {Problem.}},
     journal = {Discrete & computational geometry},
     pages = {263--264},
     publisher = {mathdoc},
     volume = {4},
     number = {6},
     year = {1989},
     zbl = {0673.52008},
     url = {http://geodesic.mathdoc.fr/item/DCG_1989__4_6_131077/}
}