@article{MOMA_1987__104_178345,
     author = {J.W. Sander},
     title = {On a {Conjecture} of {Zaremba.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {133--138},
     publisher = {mathdoc},
     volume = {104},
     year = {1987},
     zbl = {0626.10006},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1987__104_178345/}
}