Raksa, Ahnaf Ramadhan Angga, et al. “WALL-FOLLOWING ROBOT NAVIGATION CLASSIFICATION USING DEEP LEARNING WITH SPARSE CATEGORICAL CROSSENTROPY LOSS FUNCTION”. CENTRAL ASIA AND THE CAUCASUS, vol. 23, no. 1, Jan. 2022, pp. 5175-82, https://ca-c.org/CAC/index.php/cac/article/view/542.