., Hanafi, Nanna Suryana, and Abd Samad Hasan Basari. “Increase Robustness SDAE With Imputing Missing Value To Eliminate Users Sparse Data in Case E-Commerce Recommender System”. International Journal of Engineering and Technology 7, no. 4.36 (December 9, 2018): 1367–1372. Accessed February 12, 2026. https://www.sciencepubco.com/index.php/IJET/article/view/28988.