Pien Metaal

A good chew or good riddance--how to move forward in the regulation of khat consumption.

A. Klein, Pien Metaal, 2010, Journal of ethnopharmacology.

Coca Leaf in Court: Cultural Rights and the Toxicological Labyrinth

MT Romo Castro, José Carlos Bouso, Pien Metaal, 2022 .

Chewing over Khat prohibition

A. Klein, M. Jelsma, Pien Metaal, 2012 .

Chewing over Khat prohibition The globalisation of control and regulation of an ancient stimulant

A. Klein, M. Jelsma, Pien Metaal, 2012 .

Coca in Debate: The Contradiction and Conflict Between the UN Drug Conventions and the Real World

Pien Metaal, 2014 .

A good chew or good riddance--how to move forward in the regulation of khat consumption.

A. Klein, Pien Metaal, 2010, Journal of ethnopharmacology.