Navastara, Dini Adni, et al. “CLUSTERING TOPIK PENELITIAN BERBASIS UNSUPERVISED LEARNING UNTUK REKOMENDASI KOLEKSI PUSTAKA DI PERPUSTAKAAN ITS”. JUTI: Jurnal Ilmiah Teknologi Informasi, vol. 17, no. 2, Aug. 2019, pp. 125-34, https://doi.org/10.12962/j24068535.v17i2.a788.