麻烦查找一下这4篇文献，非常感谢！

【序号】：1
【作者】：Frédérick Adama, Fabrice Bertoncinia, , , Vincent Couparda, Nadège Charona, Didier Thiébautb, Didier Espinata, Marie-Claire Hennion
【题名】： Using comprehensive two-dimensional gas chromatography for the analysis of oxygenates in middle distillates: I. Determination of the nature of biodiesels blend in diesel fuel
【期刊】： Journal of Chromatography A
【年、卷、期、起止页码】： Volume 1186, Issues 1-2, 4 April 2008, Pages 236-244
【全文链接】：http://www.sciencedirect.com/science/article/pii/S0021967307021292

【序号】：2
【作者】：Pilar Manzano, Esther Arnáiz, Juan Carlos Diego, Laura Toribio, Cristina García-Viguera, José Luis Bernal, José Bern
【题名】：Comprehensive two-dimensional gas chromatography with capillary flow modulation to separate FAME isomers
【期刊】： Journal of Chromatography A
【年、卷、期、起止页码】：  Volume 1218, Issue 30, 29 July 2011, Pages 4952-4959
【全文链接】：http://www.sciencedirect.com/science/article/pii/S0021967311001841

【序号】：3
【作者】：Muhammad Tariq, Saqib Ali, Fiaz Ahmad, Mushtaq Ahmad, Muhammad Zafar, Nasir Khalid, Mir Ajab Khan
【题名】： Identification, FT-IR, NMR (1H and 13C) and GC/MS studies of fatty acid methyl esters in biodiesel from rocket seed oil
【期刊】： Fuel Processing Technology
【年、卷、期、起止页码】：Volume 92, Issue 3, March 2011, Pages 336-341
【全文链接】：http://www.sciencedirect.com/science/article/pii/S0378382010003255

【序号】：4
【作者】：J. Gamazo-Vázquez, M.S. Garca-Falcón, J. Simal-Gándara
【题名】：Control of contamination of olive oil by sunflower seed oil in bottling plants by GC-MS of fatty acid methyl esters
【期刊】： Food Control
【年、卷、期、起止页码】： Volume 14, Issue 7, October 2003, Pages 463-467
【全文链接】：http://www.sciencedirect.com/science/article/pii/S0956713502001020