Polymeric organic-inorganic proton-exchange membranes based on anionic oligomeric ionic liquid of hyperbranched structure - A. V. Strjutskij; O. A. Sobko; M. A. Gumennaja; N. S. Klimenko; A. V. Kravchenko; V. V. Kravchenko; A. V. Shevchuk; V. V. Shevchenko (Polymer journal, 2019)