Lộc, Vũ Minh. 2012. “An Expression for Measyring the Degree of the Truth of Inclusion With Interval-Valued Fuzzy Sets and Application to Resoning Based on Fuzzy Sets”. Journal of Computer Science and Cybernetics 18 (2):141-49. https://doi.org/10.15625/1813-9663/18/2/1600.