The following publications are possibly variants of this publication:
- Per-Seat, On-Demand Air Transportation Part I: Problem Description and an Integer Multicommodity Flow ModelDaniel Espinoza, R. Garcia, Marcos Goycoolea, George L. Nemhauser, Martin W. P. Savelsbergh. transci, 42(3):263-278, 2008. [doi]
- Tactical and Operational Planning of Scheduled Maintenance for Per-Seat, On-Demand Air TransportationGizem Keysan, George L. Nemhauser, Martin W. P. Savelsbergh. transci, 44(3):291-306, 2010. [doi]