Huyen, T. T. T., Ba Dung, L., Do Van, N., & Van Dinh, M. (2020). INCREMENTALLY UPDATING APPROXIMATION IN INCOMPLETE INFORMATION SYSTEMS UNDER THE VARIATION OF OBJECTS. Journal of Computer Science and Cybernetics, 36(4), 365–379. https://doi.org/10.15625/1813-9663/36/4/14650