One-machine generalized precedence constrained scheduling problems. - Erick D. Wikum; Donna Crystal Llewellyn; George L. Nemhauser (Oper. Res. Lett., 1994)

An optimization approach for planning daily drayage operations. - Yetkin Ileri; Mokhtar S. Bazaraa; Ted Gifford; George L. Nemhauser; Joel S. Sokol; Erick D. Wikum (Central Eur. J. Oper. Res., 2006)