@article{10_4064_aa_49_2_193_203,
     author = {J. Loxton and Alfred van der Poorten},
     title = {An awful problem about integers in base four},
     journal = {Acta Arithmetica},
     pages = {193--203},
     publisher = {mathdoc},
     volume = {49},
     number = {2},
     year = {1987},
     doi = {10.4064/aa-49-2-193-203},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-49-2-193-203/}
}