%0 Journal Article %A Hinze, Ralf %T Polytypic Functions Over Nested Datatypes %J Discrete mathematics & theoretical computer science %D 1998-1999 %V 3 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.46298/dmtcs.266/ %R 10.46298/dmtcs.266 %G en %F DMTCS_1999_3_4_a6