The previous page is sending you to https://www.sciencedirect.com/science/article/pii/S0254629916310420/pdf?md5=c7e9d83b41bf1d2bf0f4929dadd14f83&pid=1-s2.0-S0254629916310420-main.pdf.

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