* International Federation of Operational Research Societies* Occupational Outlook Handbook, U.S. Department of Labor Bureau of Labor Statistics* "Operation Everything: It Stocks Your Grocery Store, Schedules Your Favorite Team's Games, and Helps Plan Your Vacation.
* International Federation of Operational Research Societies* The Institute for Operations Research and the Management Sciences (INFORMS)* Occupational Outlook Handbook, U.S. Department of Labor Bureau of Labor Statistics* "Operation Everything: It Stocks Your Grocery Store, Schedules Your Favorite Team's Games, and Helps Plan Your Vacation.