Invalid Identifier
The identifier 10261/dx.doi.org/10.1016/0341-8162(81)90006-0 does not correspond to a valid Object in DSpace. This may be because of one of the following reasons:
- The URL of the current page is incorrect - if you followed a link from outside of DSpace it may be mistyped o corrupt.
- You entered an invalid ID into a form - please try again.
If you're having problems, o you expected the ID to work, feel free to contact the site administrators.