LimbonganY. L., PurwokoB. S., Trikoesoemaningtyas,., and AswidinnoorH., “Respon Genotipe Padi Sawah terhadap Pemupukan Nitrogen Di Dataran Tinggi (Response of Rice Genotypes to Nitrogen Fertilizer in Highland)”, J. Agron. Indonesia (Indonesian J. Agron.), vol. 37, no. 3, Jun. 2010.