TY  - JOUR
AU  - Hanssens, G.
AU  - Maldeghem, H. van
TI  - On projective Hjelmslev planes of level n
JO  - Glasgow mathematical journal
PY  - 1989
SP  - 257
EP  - 261
VL  - 31
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007837/
DO  - 10.1017/S0017089500007837
ID  - 10_1017_S0017089500007837
ER  -