Seldon, B.J., Doroodian, K. 1989
Jones, A.M. 1989
Warner, K.E. 1989
Slattery, M.L., Hunt, S.C., French, T.K. et al. 1989
Jensen, R., Thursby, J.G., Thursby, M.C. 1988
Kao, K., Tremblay, V.J. 1987
Baltagi, B.H., Goel, R.K. 1987
Harris, J.E. et al. 1986
Ashenfelter, O., Sullivan, D. et al. 1986
Holak, S.L., Reddy, S.K. 1986
Baltagi, B.H., Levin, D.E. 1986
Abernethy, A.M., Teel, J.E. 1985