JCP_4957JCP_4958JCP_4959JCP_4961JCP_4965JCP_4966JCP_4967JCP_4972JCP_4973JCP_4975JCP_4976JCP_4977JCP_4978JCP_4981JCP_4982JCP_4983JCP_4984JCP_4985JCP_4987JCP_4988