Every article on the Elsevier ScienceDirect platform has a DOI in the upper left corner of the abstract/citation screen.
Append the numeric portion of this field after the basic DOI phrase : http://dx.doi.org/
Example: http://dx.doi.org/10.1016/j.aaen.2007.07.001
(If queried by the "Elsevier linking hub" re destination, the user should always select ScienceDirect!)
Be sure to prefix with the "proxy prefix"