Minor refactoring in citation.vue

    },

    computed: {

        link() {

            const cite = this.citation.cite;

            if (cite.data && cite.data[0] && cite.data[0].URL) {

                //decode uri and return

                return decodeURIComponent(cite.data[0].URL);

            }

            return null;

            const citeUrl = this.citation.cite?.data?.[0]?.URL;

            return citeUrl ? decodeURIComponent(citeUrl) : null;

        },

        citationHtml() {

            const citation = this.citation;