BibTeX
@BOOK{
         Gill1981PO,
       author = "Philip E. Gill and Walter Murray and Margret H. Wright",
       title = "Practical Optimization",
       publisher = "Academic Press",
       address = "New York, NY",
       key = "Gill1981PO",
       referred = "[Chavent1996ASC], [Giles2001OtI], [Haase2001OSo], [Huiskes2001ADf],
         [Kubota1996PFP].",
       year = "1981"
}