Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
SUGITANI Hatsuo and NAKAMURA Yasuko and ISOGAI Kouji,"Structure analysis of polyamic acid prepared from pyromellitic dianhydride and 4,4'-diaminodiphenyl ether by 13C-NMR.",BUNSEKI KAGAKU,05251931,The Japan Society for Analytical Chemistry,1993,42,4,209-214,https://cir.nii.ac.jp/crid/1390001204053176704,https://doi.org/10.2116/bunsekikagaku.42.4_209