1. Arcadis, 2000. Reference method for dairy. Assessment of available energy savings potentials (Referentiemethode Zuivel. Beoordeling nog aanwezige besparingspotentieel door vergelijking met referenties). Report IMD/MA00/2211/30185. Arcadis IMD, Arnhem (in Dutch).
2. California Milk Advisory Board (CMAB), 2008. Real California cheese facts. See also: 〈http://www.californiadairypressroom.com/Press_Kit/Real_California_Cheese_Facts〉.
3. Central Bureau voor Statistiek (CBS), 2009. Statline. See also: 〈http://statline.cbs.nl/statweb/〉.
4. Cleaner Production Assessment in Dairy Processing;COWI Consulting Engineers and Planners AS (COWI),2000
5. Department for Environment, Food and Rural Affairs (DEFRA), 2009. Economics and statistics, The United Kingdom. See also: 〈http://statistics.defra.gov.uk〉 and 〈http://www.statistics.gov.uk/STATBASE〉.