@article{10_4064_cm_17_1_99_101,
     author = {J. Ceder and B. Gr\"unbaum},
     title = {On inscribing and circumscribing hexagons},
     journal = {Colloquium Mathematicum},
     pages = {99--101},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {1967},
     doi = {10.4064/cm-17-1-99-101},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-17-1-99-101/}
}