1. M. Alders, 2001 . Classification of the population with a foreign background in the Netherlands. Paper presented at the conference 'The measure and mismeasure of population. The statistical use of ethnic and racial categories in multicultural societies'. CERI, Paris, France, 17-18 December 2001. [http://www.cbs.nl/en/publications/articles/population-society/population/classification-foreign.pdf.]
2. Asking ethnic questions: Some hows, whys and wherefores