NEW SYNTHESIS OF NH$_2$ NH$_2$ CAPPED POLYANILINE TETRAMERS 4,4’-DI(p-AMINOANILINO)-DIPHENYLAMINE. Proc. YSU B: Chem. Biol. Sci. 2013, 47 (1 (230), 7-12. https://doi.org/10.46991/PYSUB.2013.47.1.007.