Integer Programming Models for Ground-Holding in Air Traffic Flow Management. - Robert L. Hoffman (1998)

A Comparison of Formulations for the Single-Airport Ground-Holding Problem with Banking Constraints. - Robert L. Hoffman; Michael O. Ball (Oper. Res., 2000)

The rate control index for traffic flow. - Robert L. Hoffman; Michael O. Ball (IEEE Trans. Intell. Transp. Syst., 2001)

A Stochastic Integer Program with Dual Network Structure and Its Application to the Ground-Holding Problem. - Michael O. Ball; Robert L. Hoffman; Amedeo R. Odoni; Ryan M. Rifkin (Oper. Res., 2003)

Ground Delay Program Planning Under Uncertainty Based on the Ration-by-Distance Principle. - Michael O. Ball; Robert L. Hoffman; Avijit Mukherjee (Transp. Sci., 2010)