B. Choi. Journal of occupational medicine. : official publication of the Industrial Medical Association, 34 (10):
979-88(October 1992)2685<m:linebreak></m:linebreak>Mesures d'associació.
W. Barlow, L. Ichikawa, D. Rosner, and S. Izumi. Journal of clinical epidemiology, 52 (12):
1165-72(December 1999)2610<m:linebreak></m:linebreak>Dissenys híbrids.