Khanra, S.
(2016).
 A production-inventory model for a deteriorating item with shortage and timedependent demand.
<em>Yugoslav Journal Of Operations Research, 21</em>(1).
Retrieved from <a href="https://yujor.fon.bg.ac.rs/index.php/yujor/article/view/356" target="_new">https://yujor.fon.bg.ac.rs/index.php/yujor/article/view/356</a>