1.
- Assessing illicit drugs in wastewater : potential and limitations of a new monitoring approach / EMCDDA project leaders Norbert Frost, Paul Griffiths - Luxembourg : Office for Official Publications of the European Communities, 2008 - 100 s.(EMCDDA insights; 9) ISBN 978-92-9168-317-8 [2, currently available 2]
- Chapters, articles