@article{MM2_1981__35_154795,
     author = {H.C. Cheng and A.D. Pollington},
     title = {A {Result} from {Diophantine} {Approximation} which has {Applications} in {Economics.}},
     journal = {Manuscripta mathematica},
     pages = {271--276},
     publisher = {mathdoc},
     volume = {35},
     year = {1981},
     zbl = {0472.10032},
     url = {http://geodesic.mathdoc.fr/item/MM2_1981__35_154795/}
}