The correct way to write English articles with the LaTeX and BibTeX style files is to start your paper with:
Incorrect style files have been in circulation. Please always use the current style files found on this site.
Errata
Spurious spaces after bibliography titles. (17/5/2007)
Solution: update style files and use above-mentioned \documentclass invocation.
Several authors encountered the following issue: an extra space was inserted in bibliography entries between the title of a paper and the following comma.
This was linked to the way the style file was switched to English. A version of the style file which was wired into handling English in an inappropriate way (changing the style file with a \frenchlangfalse) has circulated and should be replaced with the current one. The article-hermes.cls file now has a correct \frenchlangtrue which is used by default, and is overriden by the english option that you pass to \documentclass[english]{article-hermes}. This commands, among other things, the use of English double quotes around paper titles in the bibliography (by default, French double quotes are used, and as they were undefined, they didn’t print).
The biblio-hermes.bst file also now avoids adding space inside the double quotes (which is required for French double quotes). This caused spurious spaces after titles (and extra space before titles in French). The combination of these two corrections should lead to a correct layout of the bibliography. It also cites papers with two authors as (Author1 and Author2) instead of (Author1 et al.).
More information about submission can be found in the instructions to authors.