@article{MS2_1972__31_166258,
     author = {George S. Sacerdote},
     title = {On a {Problem} of {Boone.}},
     journal = {Mathematica Scandinavica},
     pages = {111--117},
     year = {1972},
     volume = {31},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MS2_1972__31_166258/}
}