# Source Documents

Place actual scientific papers, standards, and technical manuals here. Reference them from the summary files in the parent directory.

## Suggested Sources to Add

- IWA Scientific and Technical Report No. 1 — ASM1 (Henze et al., 1987)
- IWA Scientific and Technical Report No. 3 — ASM2d (Henze et al., 1999)
- IWA Scientific and Technical Report No. 9 — ASM3 (Gujer et al., 1999)
- Takacs et al. (1991) "A dynamic model of the clarification-thickening process" Water Res. 25(10), 1263-1271
- Astrom & Hagglund (2006) "Advanced PID Control" ISA
- Karassik et al. "Pump Handbook" McGraw-Hill
- Europump/Hydraulic Institute "Pump Life Cycle Costs"
- IEC 62443 series (OT security)
- IEC 61298 series (process measurement)
- EU Directive 91/271/EEC (Urban Waste Water Treatment)
- NIST SP 800-82 Rev 3 (Guide to ICS Security)

## File Naming Convention

`<author-year>-<short-title>.pdf` — e.g., `takacs-1991-clarification-thickening.pdf`