BibTeX
@TECHREPORT{
         Zhu1994LBF,
       author = "C. Zhu and R. H. Byrd and P. Lu and J. Nocedal",
       title = "{LBFGS-B}: {F}ortran Subroutines for Large-Scale Bound Constrained Optimization",
       number = "NAM-11",
       address = "IL",
       institution = "EECS Northwestern Univ.",
       key = "Zhu1994LBF",
       type = "Report",
       referred = "[Kim2001SAa].",
       year = "1994"
}