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  1. D. Trew, Obstructing Regulatory Inspections, 2016, http://www.askaboutgmp.com/obstructing-regulatory-inspections and http://www.askaboutgmp.com/obstructing-regulatory-inspections-part-2
  2. D. Trew, Laboratory Audits, On-Line Electronic Learning Course, 2016, http://learnaboutgmp.com/elearning/laboratory-audits/
  3. D. Trew, Top 10 Tips When Preparing for a Laboratory Audit, 2015, http://www.askaboutgmp.com/top-10-tips-when-preparing-for-a-laboratory-audit
  4. D. Trew, Organisation, Roles and Infrastructure for Regulated Laboratories, On-Line Electronic Learning Course, 2015, http://learnaboutgmp.com/elearning/organisation-roles-and-infrastructure-for-regulated-laboratories/
  5. D. Trew, Laboratory Investigations & Deviations, On-Line Electronic Learning Course, 2015 http://learnaboutgmp.com/elearning/laboratory-investigations-deviations/
  6. D. Trew, How Laboratory Testing should be Performed in a Quality Regulated Environment, 2015, http://www.askaboutgmp.com/how-laboratory-testing-should-be-performed-in-a-quality-regulated-environment
  7. D. Trew, Performing Analysis in a Regulated or Accredited Laboratory, On-Line Electronic Learning Course, 2015, http://www.learnaboutgmp.com/e-learning/performing-analysis-in-a-regulated-or-accredited-laboratory
  8. D. Trew, The Purpose of a Laboratory Quality Assurance Program (QAP), 2015, http://www.askaboutvalidation.com/the-purpose-of-a-laboratory-quality-assurance-program-qap
  9. D. Trew, An Introduction to Current Good Laboratory Practice (cGLP), On-Line Electronic Learning Course, 2015,  http://www.learnaboutgmp.com/e-learning/an-introduction-to-current-good-laboratory-practice-(cglp)
  10. D. Trew, Controlling Chromatographic Integration in a Regulated or Accredited Laboratory, 2015  http://www.askaboutgmp.com/controlling-chromatographic-integration-in-a-regulated-or-accredited-laboratory
  11. D. Trew, Requirements to Assure the Integrity of Laboratory Records & Data,2014, http://www.askaboutgmp.com/requirements-to-assure-the-integrity-of-laboratory-records-data
  12. D. Trew, An Easy to Understand Guide to Current Good Laboratory Practice (cGLP), Premier Validation, Nenagh, 2014 http://www.learnaboutgmp.com/book/an-easy-to-understand-guide-to-current-good-laboratory-practices-(cglp)-29
  13. D. Trew, Laboratory Data Integrity, On-Line Electronic Learning Course, 2014, http://www.learnaboutgmp.com/e-learning/laboratory-data-integrity
  14. D. Trew, The Application of Failure Mode Effects and Analysis (FEMA) to the Qualification of Laboratory Instrumentation, 2014 http://www.askaboutgmp.com/the-application-of-fmea-to-laboratory-instrument-qualification-risk-management and http://www.askaboutgmp.com/the-application-of-fmea-to-laboratory-instrument-qualification-risk-management-2,  31 May 2014
  15. D. Trew, An easy to Understand Guide to HPLC Validation, Premier Validation, Nenagh, 2013, http://www.learnaboutgmp.com/book/an-easy-to-understand-guide-to-hplc-validation-8
  16. I. Leader, P. Jupp, P. Weatherhead, V. Huynh, D. Trew, M. Handley, R. Donkor, D. Wheatley, The use of LC-MS in a forced degradation study of a novel molecule leading to the understanding of longer term drug product behaviour. Poster Presentation at 25 LC/MS Montreux Symposium 12-14 Nov 2008
  17. K. J. Box, R. E. Donkor, I. P. Leader, P. A. Jupp, D. F. Trew, C. H. Turner, J. Pharm. Biomed. Anal., 2008, 47, 301-311
  18. P.  Jupp, D. Trew and C. Turner, NMR – An alternative method to measure pKa, Poster Presentation at FDA Science Forum, Washington D.C. 18-20 April 2006
  19.  P. Jupp, P. Weatherhead, V. Huynh, D. Trew, C. Turner, T. Day, D. Wheatley, Separation, characterization and quantification of an unexpected degradant formed from tocopherol succinate polyethylene glycol using HPLC, LC-MS and NMR, Poster Presentation at FDA Science Forum, Washington D.C. 18-20 April 2006
  20. B. C. Challis, W. G. Guthrie, D.V. Roper, D. F. Trew, Chemical Compositions for Inhibiting Nitrosation Reactions in Toiletries and Cosmetics, United States Patent 5807542, 1998
  21. B. C. Challis, D. F. Trew, W. G. Guthrie, D.V. Roper, Int. J. Cosmet. Sci., 1995, 17, 119-131.
  22. B. C. Challis, W. G. Guthrie, D.V. Roper, D. F. Trew, Proceedings of the 18th International Congress of the International Federation of Societies of Cosmetic Chemists, Venice, 3-6 Oct 1994, volume 2, Pages 360-371.
  23. D. F. Trew, Analytical Methods for Non-Volatile N-Nitroso Compounds, PhD thesis, The Open University, 1992.