[1]
Thanh, L., Ngọc, N.V. and Hải, N.T. 2012. Role hierarchies for temporal constraint role-based access control model. Journal of Computer Science and Cybernetics. 21, 3 (Jul. 2012), 230–243. DOI:https://doi.org/10.15625/1813-9663/21/3/1247.