BÌNH, Nguyễn Duy.
 On the comass of forms-products.
<strong>VNU Journal of Science: Natural Sciences and Technology</strong>, [S.l.], v. 12, n. 1, mar. 1996.
ISSN 2588-1140.
Available at: &lt;<a href="https://js.vnu.edu.vn/NST/article/view/4083" target="_new">https://js.vnu.edu.vn/NST/article/view/4083</a>&gt;. Date accessed: 25 may 2024.