@article{10_1017_S0017089500003803,
     author = {Fraser, Owen H. and Gordon, Basil},
     title = {Solution to a problem of {A.} {D.} {Sands}},
     journal = {Glasgow mathematical journal},
     pages = {115--117},
     year = {1979},
     volume = {20},
     number = {2},
     doi = {10.1017/S0017089500003803},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500003803/}
}