Each article has a DOI (Digital Object Identifier) which may be used as a permanent URL to the article's abstract (and the associated fulltext PDF). Navigate to the article and look for the DOI near the top.
This number, prefaced by "http://dx.doi.org", will form a stable URL. Example: http://dx.doi.org/10.1007/s10288-007-0047-3
Be sure to prefix with the "proxy prefix"