Redirect Notice
The previous page is sending you to
https://www.sciencedirect.com/science/article/pii/S0007153651800433/pdf?md5=de7fafa0df18a3f016bbaf1756de3b56&pid=1-s2.0-S0007153651800433-main.pdf
.
If you do not want to visit that page, you can
return to the previous page
.