Depth-First Solutions for the Deliveryman Problem on Tree-Like Networks: An Evaluation Using a Permutation Model. - Ian R. Webb (Transp. Sci., 1996)

Cyclical schedules for one-warehouse, multi-retailer systems with dynamic demands. - B. R. Buzby; Gerard M. Campbell; Ian R. Webb (J. Oper. Res. Soc., 1999)

On crossings, the Crossing Postman Problem, and the Rural Postman Problem. - Robert S. Garfinkel; Ian R. Webb (Networks, 1999)