TY  - JOUR
AU  - Soukup, Lajos
TI  - A non-special $\omega_2$-tree with special $\omega_1$-subtrees
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1990
SP  - 607
EP  - 612
VL  - 31
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1990__31_3_a20/
LA  - en
ID  - CMUC_1990__31_3_a20
ER  -