docs: public void writeReferences() throws RDFHandlerException {
  		Iterator<Reference> referenceIterator = this.referenceQueue.iterator();
  		for (Resource resource : this.referenceSubjectQueue) {
  			final Reference reference = referenceIterator.next();
  			if (this.declaredReferences.add(resource)) {
  				writeReference(reference, resource);
  			}
  		}
  		this.referenceSubjectQueue.clear();
  		this.referenceQueue.clear();
  
  		this.snakRdfConverter.writeAuxiliaryTriples();
  	}