Inventory and investment in setup operations under return on investment maximization. - Toshitsugu Otake; K. Jo Min; Cheng-Kang Chen (Comput. Oper. Res., 1999)

Inventory and investment in quality improvement under return on investment maximization. - Toshitsugu Otake; K. Jo Min (Comput. Oper. Res., 2001)

Inventory and investment in setup and quality operations under Return On Investment maximization. - Jie Li; K. Jo Min; Toshitsugu Otake; Timothy Van Voorhis (Eur. J. Oper. Res., 2008)