Display DOI in Table of Content page OJS 2.4.3

Dear Alec Smecher
I have a question. I want showed DOI in table of content page for each issue. But show DOI end of Article now.
like this in the picture,

our web site link: http://knh.shmu.ac.ir/index.php/site/index
my version OJS is 2.4.3
Of course i tested all topics in pkp site for my subject but, no successfully,

Many thank you

Masi Miri

This thread describes doing this in 2.4.7, and includes a plugin developed by a community member: