2Rekers louis J; Laib roger D, et al. Polymerization process using a bimodal silica gel as a catalyst support:US, 5321105 A [P]. 1994-06-14. http://worldwide.espacenet.com/ pubhcationDetails/biblio?DB=EPODOC&II=0&ND=3&adjacent=true&locale=en_EP&FT=D&date=19940614&CC=US&NR=5321105A&KC=A. 被引量：1
5Levine; Isaac Jacob(Somerville, NJ), Karol; Frederick John (Belle Mead, N J). Titanium-modified silyl chromate catalysts for ethylene polymerization[M] U S Pat Appl, US 4100105,1978. 被引量：1
