• Guenther Gapp, Syvlie Guyomard, Pascale Nabet, Jean Scouvart: Evaluation of the applications of a system for real- time microbial analysis of pharmaceutical water systems; Europ. Journal of Parenteral Sciences, Vol 4, 131 – 136, 2000
  • J.C. Gray, S. Morandell, G.Gapp, N.L.Goff, G. Neuhaus, A. Staerk: Identification of Microorganisms after Milliflex Rapid Detection- A Possibility to Identify Nonsterile Findings in the Milliflex Rapid Sterility Test, PDA J Pharm Sci Tech Jan/ Feb 2011, Vol 65, 42- 54
  • Guenther Gapp, Peter Holzknecht : Risk Analysis of Sterile Production Plants: A New and Simple, Workable Approach ; PDA J Pharm Sci and Tech 2011, , Vol 65, 217- 226 (NOTE: Award for Best Paper in the PDA Journal 2011) 
    Link to the Best Paper in the PDA Journal 2011
  • Guenther Gapp: New Risk Assessment Tools for Sterile Products; Contamination Control in Healthcare Products Vol 2, 271- 317, March 2014DHI Publishing, LLC,  (PDA Bookstore /
  • European Pharmaceutical Review / Magazine Issue 3 2014, Microbiology IN-DEPTH FOCUS, page 33- 36, How to deal with non-sterile results in aseptic processing,  Publication

  • European Pharmaceutical Reviw/ Volume 20/ Issue 2/ 2015,  Reducing Microbial Contamination via Risk Assessment,Publication 

  • Poster PDA Annual Meeting 2015: Link 

  • Poster PDA Annual Meeting 2017: Link

  • PDA Letter 2017, A Simple Way of Aseptic Processing Risk Analysis: Link 

  • PDA Aseptic Processing Industry Survey 2017 : Link 

  • PDA PTC for Isolators 2020