PHAM, Thai Hong.
 On discretisable formulas in duration calculus.
<strong>VNU Journal of Science: Mathematics - Physics</strong>, [S.l.], v. 20, n. 1, apr. 2017.
ISSN 2588-1124.
Available at: &lt;<a href="https://js.vnu.edu.vn/MaP/article/view/4115" target="_new">https://js.vnu.edu.vn/MaP/article/view/4115</a>&gt;. Date accessed: 18 may 2024.