def refcount(self):
        """Number of references of an article.
        Note: Requires the FULL view of the article.
        """
        refs = self.items.find('bibrecord/tail/bibliography', ns)
        try:
            return refs.attrib['refcount']
        except AttributeError:  # refs is None
            return None
Number of references of an article.
        Note: Requires the FULL view of the article.