TY  - JOUR
AU  - Walsh, Timothy R.
TI  - Space-efficient generation of nonisomorphic maps and hypermaps
JO  - Journal of integer sequences
PY  - 2015
VL  - 18
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/JIS_2015__18_4_a2/
LA  - en
ID  - JIS_2015__18_4_a2
ER  -