W. Fawwaz Al Maki and A. Jafar Makrufi, “Support vector machine with a firefly optimization algorithm for classification of apple fruit disease”, MATRIK : Jurnal Manajemen, Teknik Informatika dan Rekayasa Komputer, vol. 22, no. 1, pp. 177–188, Nov. 2022, doi: 10.30812/matrik.v22i1.2365.