BibTeX
@MASTERSTHESIS{
         Horton1989NDA,
       AUTHOR = "Horton, S.",
       TITLE = "Numerical Derivatives: {A} Comparative Study",
       SCHOOL = "Mathematics Department, University of Southern California",
       YEAR = "1989",
       ADDRESS = "Los Angeles, Calif. 90089",
       REFERRED = "[Tesfatsion1991AEo]."
}