@phdthesis{UNY2284,
           title = {PEMROGRAMAN GEOMETRIK UNTUK MENYELESAIKAN MASALAH PEMROGRAMAN NONLINEAR},
          school = {UNY},
          author = {Widyastuti Wuri},
           month = {July},
            year = {2010},
             url = {http://eprints.uny.ac.id/2284/}
}