Substitution invariant cutting sequences D. Crisp; W. Moran; A. Pollington; P. Shiue — 1993 Journal de théorie des nombres de Bordeaux
The k -dimensional Duffin and Schaeffer conjecture A. D. Pollington; R. C. Vaughan — 1989 Journal de théorie des nombres de Bordeaux We show that the Duffin and Schaeffer conjecture holds in all dimensions greater than one.