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<strong>VNU Journal of Science: Natural Sciences and Technology</strong>, [S.l.], v. 10, n. 7, dec. 1994.
ISSN 2588-1140.
Available at: &lt;<a href="https://js.vnu.edu.vn/NST/article/view/4304" target="_new">https://js.vnu.edu.vn/NST/article/view/4304</a>&gt;. Date accessed: 05 may 2024.