Dat, N., & 		Truong, H.
(2008).
 Concept lattice and adjacency matrix.
<em>VNU Journal Of Science: Mathematics - Physics, 24</em>(1).
Retrieved from <a href="https://js.vnu.edu.vn/MaP/article/view/3480" target="_new">https://js.vnu.edu.vn/MaP/article/view/3480</a>