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LAUSANNE, CH, vol. 29, no. 3 / 4, 1 February 1990 (1990-02-01), pages 389-398, XP000233854 ISSN: 0378-7753;  PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05);  ISHIHARA ET AL: "Polystyrene-bound tetrafluorophenylbis(triflyl)methane as an organic-solvent-swellable and strong bronsted acid catalyst", ANGEWANDTE CHEMIE, VCH VERLAGSGESELLSCHAFT, WEINHEIM, DE, vol. 113, no. 21, 5 November 2001 (2001-11-05), pages 4201 - 4203, XP002313301, ISSN: 0044-8249;  EISMAN G A: "THE APPLICATION OF DOW CHEMICAL'S PERFLUORINATED MEMBRANES IN PROTON-EXCHANGE MEMBRANE FUEL CELLS", JOURNAL OF POWER SOURCES, ELSEVIER SEQUOIA S.A. LAUSANNE, CH, vol. 29, no. 3 / 4, 1 February 1990 (1990-02-01), pages 389 - 398, XP000233854, ISSN: 0378-7753;  PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05),relevantClaims[1-7],relevantPassages[&lt;pp&gt;A&lt;/pp&gt;An automated computer translation of this Japanese publication can be found on the website of the Japanese Patent Office: http://www.ipdl.ncipi.go.jp/homepg_e.ipdl];  ISHIHARA ET AL: "Polystyrene-bound tetrafluorophenylbis(triflyl)methane as an organic-solvent-swellable and strong bronsted acid catalyst", ANGEWANDTE CHEMIE, VCH VERLAGSGESELLSCHAFT, WEINHEIM, DE, vol. 113, no. 21, 5 November 2001 (2001-11-05), pages 4201 - 4203, XP002313301, ISSN: 0044-8249,relevantClaims[1-4],relevantPassages[&lt;pp&gt;4201&lt;/pp&gt;&lt;ppl&gt;4202&lt;/ppl&gt;&lt;coll&gt;L&lt;/coll&gt;];  EISMAN G A: "THE APPLICATION OF DOW CHEMICAL'S PERFLUORINATED MEMBRANES IN PROTON-EXCHANGE MEMBRANE FUEL CELLS", JOURNAL OF POWER SOURCES, ELSEVIER SEQUOIA S.A. LAUSANNE, CH, vol. 29, no. 3 / 4, 1 February 1990 (1990-02-01), pages 389 - 398, XP000233854, ISSN: 0378-7753,relevantClaims[1-7],relevantPassages[&lt;pp&gt;389&lt;/pp&gt;|&lt;pp&gt;390&lt;/pp&gt;&lt;ppl&gt;392&lt;/ppl&gt;]