by Levels, P.J, Gubbels, R.E.M.B, Denucé, J.M
Published in Comparative biochemistry and physiology. A, Comparative physiology (1986)

by Ruijter, J M, Peute, J, Levels, P J
Published in Cell and tissue research (01.06.1987)

by de Kok, T.M.C.M., Levels, P.J., van Faassen, A., Hazen, M., ten Hoor, F., Kleinjans, J.C.S.
Published in Journal of Chromatography B: Biomedical Sciences and Applications (16.09.1992)

by DE KOK, T. M. C. M, LEVELS, P. J, VAN FAASSEN, A, HAZEN, M, TEN HOOR, F, KLEINJANS, J. C. S
Published in Journal of chromatography. Biomedical applications (1992)