Redirect Notice
 The previous page is sending you to https://www.sciencedirect.com/science/article/pii/S0254629915302234/pdf?md5=afee3d67d2c07d34768baf8a68884a2c&pid=1-s2.0-S0254629915302234-main.pdf.

 If you do not want to visit that page, you can return to the previous page.