1. 1999/30/EC. Council Directive 1999/30/EC of 22 April 1999 relating to limit values for sulphur dioxide, nitrogen dioxide and oxides of nitrogen, particulate matter and lead in ambient air. European Commission.
2. 2001/81/EC. Directive 2001/81/EC of the European Parliament and of the Council of 23 October 2001 on national emission ceilings for certain atmospheric pollutants. European Commission.
3. Systems for eliminating pathogens from exhaust air of animal houses;Aarnink,2005
4. Report 66: Reduction of fine dust emission by combi-scrubber of Big Dutchman;Aarnink,2007
5. Albright's chemical engineering handbook;Albright,2009