by Mantel, R.J., Fontein, M.
Published in International journal of production economics (01.07.1993)

by VAN NISPEN TOT PANNERDEN, E B, FONTEIN, M T
Published in Pharmaceutisch weekblad (22.03.1958)

by Fontein, E M, Reuser, H, HEIJDENRIJK, L J, Sips, P
Published in MUNSTER (G.F.R.) (01.06.1972)