code: def convert_references(ref_data, fmt):
      '''
      Returns the basis set references as a string representing
      the data in the specified output format
      '''
  
      # Make fmt case insensitive
      fmt = fmt.lower()
      if fmt not in _converter_map:
          raise RuntimeError('Unknown reference format "{}"'.format(fmt))
  
      # Sort the data for all references
      for elref in ref_data:
          for rinfo in elref['reference_info']:
              rdata = rinfo['reference_data']
              rinfo['reference_data'] = [(k, sort.sort_single_reference(v)) for k, v in rdata]
  
      # Actually do the conversion
      ret_str = _converter_map[fmt]['function'](ref_data)
  
      return ret_stf convert_references(ref_data, fmt):
      '''
      Returns the basis set references as a string representing
      the data in the specified output format
      '''
  
      # Make fmt case insensitive
      fmt = fmt.lower()
      if fmt not in _converter_map:
          raise RuntimeError('Unknown reference format "{}"'.format(fmt))
  
      # Sort the data for all references
      for elref in ref_data:
          for rinfo in elref['reference_info']:
              rdata = rinfo['reference_data']
              rinfo['reference_data'] = [(k, sort.sort_single_reference(v)) for k, v in rdata]
  
      # Actually do the conversion
      ret_str = _converter_map[fmt]['function'](ref_data)
  
      return ret_str
docs: Returns the basis set references as a string representing
      the data in the specified output format