by Hurley, J A, Anderson, T E, Dear, W, Andrish, J T, Bergfeld, J A, Weiker, G G
Published in The American journal of sports medicine (01.07.1992)

by Alfred, R H, Belhobek, G, Bergfeld, J A
Published in The American journal of sports medicine (01.11.1992)

by Grabiner, M.D., Weiker, G.G., Anderson, T.E., Bergfeld, J.A.
Published in Journal of biomechanics (1990)

by Kujala, U M, Heinonen, O J, Lehto, M, Järvinen, M, Bergfeld, J A
Published in Sports medicine (Auckland) (01.10.1988)