Tung, C.
(2016).
 Note on inventory models with a permissible delay in payments.
<em>Yugoslav Journal Of Operations Research, 24</em>(1).
Retrieved from <a href="https://yujor.fon.bg.ac.rs/index.php/yujor/article/view/433" target="_new">https://yujor.fon.bg.ac.rs/index.php/yujor/article/view/433</a>