Elements that can be included along with data characters inside the content model of the <comment> element, which is a textual annotation within a citation
<!ENTITY % comment-elements "| %address-link.class; | %article-link.class; | %emphasis.class; | %inline-display.class; | %inline-math.class; | %phrase.class; | %subsup.class;" >
articleauthcustom-models.ent