%0 Journal Article %A Sivashankari, C. K. %A Ramachandran, Lalitha %T Inventory models with integrated time dependent demands for deteriorating items – in third and fourth order equations %J RAIRO. Operations Research %D 2021 %P 2883-2905 %V 55 %N 5 %I EDP-Sciences %U https://www.numdam.org/articles/10.1051/ro/2021099/ %R 10.1051/ro/2021099 %G en %F RO_2021__55_5_2883_0