Redirect Notice
The previous page is sending you to
https://www.sciencedirect.com/science/article/pii/S0007153688800950/pdf?md5=325bdf3ffffb3815c513bfc16791f49a&pid=1-s2.0-S0007153688800950-main.pdf
.
If you do not want to visit that page, you can
return to the previous page
.