Hi Ph999
what kind of journal is this? nowadays it is always more important to add the doi number in the reference, you don't have to do that but it is well seen and suggested by editors.
But again, I'm not sure I understand why is the article no longer to be found online. Even if the text can't be downloaded or even the abstract can't be read, the title, volume and page numbers should still be visible in the table of content of the relevant journal issue.
Or was it a purely online journal? Is the journal still publishing??
xx
wanderingbit