Redirect Notice
 The previous page is sending you to https://www.sciencedirect.com/science/article/pii/S1071575496900169/pdf?md5=e815f9f5caedf4cd96a0b7b8f6a3fb94&pid=1-s2.0-S1071575496900169-main.pdf.

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