Deletion of Xerlin

Comment: I did a preliminary search via Google Books and turned up 6 books. A Google search shows this is an active project, so I can't see how it would appear to be discontinued? I'm unsure as to what search terms the nominator tried but there seem to be plenty of books can that establish . I'll include them here after I add them to citation templates
Stance: comment
Cited policy: Wikipedia:Reliable sources (WP:RS)