@unpublished{UNY2512,
          author = {Agung Nugroho Wahyu},
           title = {OPTIMISASI PROGRAM NONLINIER DENGAN KENDALA MENGGUNAKAN METODE PENALTY DAN METODE BARRIER},
          school = {UNY},
            year = {2005},
             url = {http://eprints.uny.ac.id/2512/}
}