. 2015 Sep 30;2015:780879. doi: 10.1155/2015/780879
Copyright © 2015 M. Baskaran and C. Sadagopan.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 2.
The first-order energy model.