“…Babic et al 1984, Mangoubi and Mathaisel 1985, Vanderstraeten and Bergeron 1988, Bihr 1990, Wirasinghe and Bandara 1990, Srihari and Muthukrishnan 1991, Zhang et al 1994, Cheng 1997, Yan and Chang 1998, Haghani and Chen 1998, Bolat 1999, 2000, Yan and Huo 2001, Yan et al 2002, Ding et al 2004, 2005, Yan and Tang 2007. These models are formulated as zero-one integer (linear or quadratic) programs, mixed integer programs or network flow problems.…”