7M Selim Akturk and Siraceddin Onen. Dynamic lot sizing and tool management in automated manufacturing systems. Computers & Operations Research. Volume 29, Issue 8, July 2002, Pages 1059- 1079
8M Selim Akturk and Siraceddin Onen, Joint lot sizing and tool management in a CNC environment Computers in Industry Volume 40,Issue 1, September 1999, Pages 61 - 75