https://www.efecon.tuiasi.ro/en/research-article-en-2/synthesis-of-lppe-by-gas-phase-copolymerization-of-ethylene-with-1-butene-a-highly-efficient-chromium-oxide-supported-catalyst/ EFECON Thu, 25 May 2023 17:46:14 +0000 hourly 1 https://wordpress.org/?v=6.1.1