Karsten Kroner et al., « Badminton injuries », British Journal of Sports Medicine, vol. 24, n°3, 1990.
yonex.ch
(en) YONEX Suisse, 2012, pdf p. 13/14 : « The shuttlecock’s feathers do indeed come from a goose or a duck. The feathers used for producing one shuttlecock are 16 feathers from either right or left wing. We don’t use feathers from both right and left wings for one shuttlecock as this affects flight. » (source).
