The Generalized Divisor Problem Over Arithmetic Progressions. Robert A. Smith — 1982 Mathematische Annalen
The average order of a class of arithmetic functions over arithmetic progressions with applications to quadratic forms. Robert A. Smith — 1980 Journal für die reine und angewandte Mathematik
Optimality criteria for deterministic discrete-time infinite horizon optimization. Schochetman, Irwin E.; Smith, Robert L. — 2005 International Journal of Mathematics and Mathematical Sciences
On the closure of the sum of closed subspaces. Schochetman, Irwin E.; Smith, Robert L.; Tsui, Sze-Kai — 2001 International Journal of Mathematics and Mathematical Sciences