1. H.W.M. Witlox A. Holt A unified model for jet, heavy and passive dispersion including droplet rainout and re-evaporation 1999 315 344
2. H.W.M. Witlox M. Harper UDM theory manual, Phast 6.7 technical documentation, DNV Software 2011
3. L. Post Section 7C in “HGSYSTEM 3.0 Technical Reference Manual,” 1994
4. The HEGADAS model for ground-level heavy-gas dispersion, II. Time-dependent model;Witlox;Atmos Environ,1994
5. H.W.M. Witlox M. Harper Modelling, verification and validation by Phast relating to H2S toxic releases 2008