Redirect Notice
The previous page is sending you to
https://www.sciencedirect.com/science/article/pii/S0007153682801903/pdf?md5=b99fd204388ff34403e24b7dc2cecfe0&pid=1-s2.0-S0007153682801903-main.pdf
.
If you do not want to visit that page, you can
return to the previous page
.