@article{RCM_1990__24_3-4_181842,
     author = {Arnold Knopfmacher and D. S. Lubinsky},
     title = {Non-normality of continued fraction partial quotients modulo q},
     journal = {Revista colombiana de matematicas},
     pages = {179--182},
     publisher = {mathdoc},
     volume = {24},
     number = {3-4},
     year = {1990},
     zbl = {0734.11042},
     url = {http://geodesic.mathdoc.fr/item/RCM_1990__24_3-4_181842/}
}