TY  - JOUR
AU  - Mario Gionfriddo
TI  - Partial parallel classes in Steiner systems
JO  - Colloquium Mathematicum
PY  - 1989
SP  - 221
EP  - 227
VL  - 57
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-57-2-221-227/
DO  - 10.4064/cm-57-2-221-227
LA  - en
ID  - 10_4064_cm_57_2_221_227
ER  -