Rosenblatt and Kaspi (Rosenblatt, M. J., M. Kaspi. 1985. A dynamic programming algorithm for joint replenishment under general order cost functions. Management Sci. 31 (March) 369-373.) proposed a dynamic programming algorithm for determining joint ordering policies for a class of items with EOQ-like demands and holding costs and "general order cost functions." Comments that follow by Queyranne and Quernheim and Bastian provide some counter-examples.