Those elements that may mix with data characters inside a <citation> element
<!ENTITY % citation-elements "| %article-link.class; | %appearance.class; | %emphasis.class; | %inline-display.class; | %inline-math.class; | %label.class; | %math.class; | %phrase.class; | %references.class; | %simple-link.class; | %subsup.class; | %x.class;" >
archivecustom-models.ent