TY  - JOUR
AU  - Jakubík, Ján
TI  - On projective intervals in a modular lattice
JO  - Mathematica Bohemica
PY  - 1992
SP  - 293
EP  - 298
VL  - 117
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/MB.1992.126283/
DO  - 10.21136/MB.1992.126283
LA  - en
ID  - 10_21136_MB_1992_126283
ER  -