T. VanderWeele, M. Hernán, and J. Robins. Epidemiology (Cambridge, Mass.), 19 (5):
720-8(September 2008)5052<m:linebreak></m:linebreak>JID: 9009644; ppublish;<m:linebreak></m:linebreak>Mesures d'associació.
D. MacKinnon, J. Krull, and C. Lockwood. Prevention science : the official journal of the Society for Prevention Research, 1 (4):
173-81(December 2000)3530<m:linebreak></m:linebreak>Mesures d'associació.