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Journal of Polymer Science: Polymer Letters Ed., (1979), Vol 17, стр. 85 - 89
Synthesis of aromatic polyether by phase-transfer-catalyzed polycondensation with quaternary ammonium salts, crown ethers, and poly(ethylene glycol)s
Y. Imai, M. Ueda, M. Ii
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http://www3.interscience.wiley.com/journal/104057378/abstract
