Chu, H.H.Chu2010-05-092018-06-282010-05-092018-06-281984http://ntur.lib.ntu.edu.tw//handle/246246/181483application/pdf494649 bytesapplication/pdfen-USOn the GE2 of graded ringsjournal articlehttp://ntur.lib.ntu.edu.tw/bitstream/246246/181483/1/05.pdf