R. J. M. Sangil, M. Mallari, J. E. Mangune, and J. P. Sigua, “HCCI eScholar: An Online Research Database Archival System with TF-IDF and Cosine Similarity Algorithms”, IJERIP, vol. 2, no. 7, pp. 2118–2124, Jul. 2026, doi: 10.5281/zenodo.21639964.