Yen, HwHwYenNg, W.W.NgSamid, I.I.SamidYariv, A.A.YarivHUNG-WEI YEN2020-05-122020-05-1219760030-4018https://scholars.lib.ntu.edu.tw/handle/123456789/491480journal article10.1016/0030-4018(76)90242-XWOS:A1976BX00900001