DAT, Nguyen Huu.
 Contractible sublatices in data analysis.
<strong>VNU Journal of Science: Natural Sciences and Technology</strong>, [S.l.], v. 15, n. 5, dec. 1999.
ISSN 2588-1140.
Available at: &lt;<a href="https://js.vnu.edu.vn/NST/article/view/3767" target="_new">https://js.vnu.edu.vn/NST/article/view/3767</a>&gt;. Date accessed: 16 feb. 2025.