@article{MS2_1982__51_166798,
     author = {\"Oystein J. R\"odseth},
     title = {On h-bases for n {II.}},
     journal = {Mathematica Scandinavica},
     pages = {5--21},
     publisher = {mathdoc},
     volume = {51},
     year = {1982},
     zbl = {0497.10043},
     url = {http://geodesic.mathdoc.fr/item/MS2_1982__51_166798/}
}