Synthesis and thermal, mechanical and gas permeation properties of aromatic polyimides containing different linkage groups.Published in:Polymer International, 2015, v. 64, n. 1, p. 154, doi. 10.1002/pi.4796By:Sava, Ion;Chisca, Stefan;Wolinska ‐ Grabczyk, Aleksandra;Jankowski, Andrzej;Sava, Mitica;Grabiec, Eugenia;Bruma, MariaPublication type:Article