TY  - JOUR
AU  - Dirk van Dalen
TI  - A model for HAS. A topological interpretation of the theory of species of natural numbers
JO  - Fundamenta Mathematicae
PY  - 1974
SP  - 167
EP  - 174
VL  - 82
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-82-2-167-174/
DO  - 10.4064/fm-82-2-167-174
LA  - en
ID  - 10_4064_fm_82_2_167_174
ER  -