Some properties of the fleet assignment problem. - Zonghao Gu; Ellis L. Johnson; George L. Nemhauser; Wang Yinhua (Oper. Res. Lett., 1994)

Sequence Independent Lifting of Cover Inequalities. - Zonghao Gu; George L. Nemhauser; Martin W. P. Savelsbergh (IPCO, 1995)

Lifted Cover Inequalities for 0-1 Integer Programs: Computation. - Zonghao Gu; George L. Nemhauser; Martin W. P. Savelsbergh (INFORMS J. Comput., 1998)

MIP: Theory and Practice - Closing the Gap. - Robert E. Bixby; Mary Fenelon; Zonghao Gu; Edward Rothberg; Roland Wunderling (System Modelling and Optimization, 1999)

Lifted Cover Inequalities for 0-1 Integer Programs: Complexity. - Zonghao Gu; George L. Nemhauser; Martin W. P. Savelsbergh (INFORMS J. Comput., 1999)

Lifted flow cover inequalities for mixed 0-1 integer programs. - Zonghao Gu; George L. Nemhauser; Martin W. P. Savelsbergh (Math. Program., 1999)

Sequence Independent Lifting in Mixed Integer Programming. - Zonghao Gu; George L. Nemhauser; Martin W. P. Savelsbergh (J. Comb. Optim., 2000)

Mixed-Integer Programming: A Progress Report. - Robert E. Bixby; Mary Fenelon; Zonghao Gu; Edward Rothberg; Roland Wunderling (The Sharpest Cut, 2004)

Generating Multiple Solutions for Mixed Integer Programming Problems. - Emilie Danna; Mary Fenelon; Zonghao Gu; Roland Wunderling (IPCO, 2007)

Presolve Reductions in Mixed Integer Programming. - Tobias Achterberg; Robert E. Bixby; Zonghao Gu; Edward Rothberg; Dieter Weninger (INFORMS J. Comput., 2020)