with Leijenhorst Cees, « Karl Schuhmann, 19 march 1941 – 18 march 2003 », in K. Schuhmann, Selected papers on phenomenology, Dordrecht, Kluwer, 2004, pp. ix-xiii.
with Leijenhorst Cees, « Preface », in K. Schuhmann, Selected papers on phenomenology, Dordrecht, Kluwer, 2004, pp. vii-viii.
Schuhmann Karl, Selected papers on phenomenology, Dordrecht, Kluwer, 2004.
Schuhmann Karl, Selected papers on renaissance philosophy and on Thomas Hobbes. P. Steenbakkers & C. Leijenhorst (Eds.), Dordrecht, Springer, 2004.