T. V. Niekerk

Managing laying hen flocks with intact beaks

T. V. Niekerk, 2017 .

Dermanyssus gallinae in Dutch poultry farms: Results of a questionnaire on severity, control treatments, cleaning, and biosecurity

M. Mul, R. Emous, T. V. Niekerk, 2010 .

The effect of manure and litter handling and indoor climatic conditions on ammonia emissions from a battery cage and an aviary housing system for laying hens

P. Koerkamp, A. Keen, A. Keen, 1995 .

Performance of commercial laying hen genotypes on free range and organic farms in Switzerland, France and The Netherlands

F. Leenstra, V. Maurer, M. Bestman, 2012, British poultry science.

Low input breeds: search for the ideal laying hen for organic and free range systems.

Monique Bestman, Veronika Maurer, Esther Zeltner, 2011 .