entClause = Object.create(null);
    this.biblio.refParentClause = refParentClause;
    let refsByClause = this.biblio.refsByClause;
    Object.keys(refsByClause).forEach(clause => {
      refsByClause[clause].forEach(ref => {
        refParentClause[ref] = clause;
      });
    });
  }
};

Search.prototype.documentKeydown = function (e) {
  if (e.key === '/') {
    e.preventDefault();
    e.stopPropagation();
    this.triggerSearch();
  }
};

Search.prototype.searchBoxKeydown = function (e) {
  e.stopPropa