code: def sort_references_dict(refs):
      if _use_odict:
          refs_sorted = OrderedDict()
      else:
          refs_sorted = dict()
      refs_sorted['molssi_bse_schema'] = refs['molssi_bse_schema']
      for k, v in sorted(refs.items()):
          refs_sorted[k] = sort_single_reference(v)
      return refs_sorted