The previous page is sending you to https://www.sciencedirect.com/science/article/pii/S002440829890156X/pdf?md5=a42be151f17f90a034541f25c869d5f1&pid=1-s2.0-S002440829890156X-main.pdf.

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