Multiresidue determination of pesticides in plants by high-performance liquid chromatography following gel permeation chromatographic clean-up A. Balinova Journal of Chromatography A Volume 823, Issues 1-2, 9 October 1998, Pages 11-16 http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TG8-3V785CT-3&_user=1915929&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000055340&_version=1&_urlVersion=0&_userid=1915929&md5=8ed77482206cfbf2d6ba758adcc11d2c
High-performance liquid chromatographic determination of benzoylurea insecticides residues in grapes and wine using liquid and solid-phase extraction George E. Miliadis, Nicholas G. Tsiropoulos, , and Pipina G. Aplada-Sarlis Journal of Chromatography A Volume 835, Issues 1-2, 12 March 1999, Pages 113-120 http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TG8-3W1Y4WB-B&_user=1915929&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_version=1&_urlVersion=0&_userid=1915929&md5=3fa749f86e14e8165945a6673f8540bc