1. Leversee RL, Shabushnig JG. “A survey of industry practice for the visual inspection of injectable products, (PDA Preliminary Report)” 2008.
2. Shabushnig JG, Melchore JA, Geiger M, Chrai S, Gerger ME. “A proposed working standard for the validation of particulate inspection in sterile solutions,” podium presentation at PDA annual meeting; Philadelphia, PA 1994.
3. Knapp J. “The bridge between visible particle data and the accuracy and repeatability requirements of PAT, one safe step at a time,” Paper presented at: PDA Visual Inspection Forum, Bethesda, MD 2005.
4. Budd G. “Optimizing the correlation of automated inspection data obtained from electronic sensors to (NIST Traceable) referee level particle standards,” paper presented at: PDA visual inspection forum, Bethesda, MD 2005.
5. Barber, Thomas A. “Training and qualification of inspectors for manual visual inspection,” Paper presented at: PDA Visual Inspection Forum, Bethesda MD. 2005.