@phdthesis{UNY12964,
          author = {Nazilatul Lailiyah},
           title = {Bifurkasi pada Model Susceptible Infected Recovered (SIR) dengan waktu Tunda dan Laju Penularan Bilinear},
           month = {July},
            year = {2014},
          school = {UNY},
             url = {http://eprints.uny.ac.id/12964/}
}