Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Shinji Ando and Tohru Matsuura and Shigekuni Sasaki,"15N‐, 1H‐, and 13C‐NMR chemical shifts and electronic properties of aromatic diamines and dianhydrides",Journal of Polymer Science Part A: Polymer Chemistry,0887-624X,Wiley,1992-10,30,11,2285-2293,https://cir.nii.ac.jp/crid/1361418519368684416,https://doi.org/10.1002/pola.1992.080301101