1. HGSYSTEM 3.0 Technical Reference Manual;Post,1994
2. The behaviour of denser than air ammonia in the presence of obstacles — wind tunnel experiments;Guldemond;Plant/Operations Progress,1988
3. Flow and dispersion around buildings in light wind conditions;Robins,1994
4. Low wind speed meteorology, for Cambridge Atmospheric Dispersion Modelling Course;Smith,1992
5. Classification of Hazardous Locations;Cox;IChemE,1990