Peter J. Grabner Peter Kirschenhofer Robert F. Tichy Combinatorial and Arithmetical Properties of Linear Numeration Systems. 245-267 2002 22 Combinatorica 2 http://link.springer.de/link/service/journals/00493/bibs/2022002/20220245.htm db/journals/combinatorica/combinatorica22.html#GrabnerKT02