code: def read_docs(self, payloadType, els_client = None):
          
          if els_client:
              self._client = els_client;
          elif not self.client:
              raise ValueError('''Entity object not currently bound to els_client instance. Call .read() with els_client argument or set .client attribute.''')
          try:
              api_response = self.client.exec_request(self.uri + "?view=documents")
              if isinstance(api_response[payloadType], list):
                  data = api_response[payloadType][0]
              else:
                  data = api_response[payloadType]
              docCount = int(data["documents"]["@total"])
              self._doc_list = [x for x in data["documents"]["abstract-document"]]
              for i in range (0, docCount//self.client.num_res):
                  try:
                      api_response = self.client.exec_request(self.uri + "?view=documents&start=" + str((i+1) * self.client.num_res+1))
                      if isinstance(api_response[payloadType], list):
                          data = api_response[payloadType][0]
                      else:
                          data = api_response[payloadType]
                      self._doc_list = self._doc_list + [x for x in data["documents"]["abstract-document"]]
                  except  (requests.HTTPError, requests.RequestException) as e:
                      if hasattr(self, 'doc_list'):       ## We don't want incomplete doc lists
                          self._doc_list = None
                      raise e
              logger.info("Documents loaded for " + self.uri)
              return True
          except (requests.HTTPError, requests.RequestException) as e:
              logger.warning(e.args)
              return False
docs: Fetches the list of documents associated with this entity from
              api.elsevier.com. If need be, splits the requests in batches to
              retrieve them all. Returns True if successful; else, False.
  			NOTE: this method requires elevated API permissions.
  			See http://bit.ly/2leirnq for more info.