TY  - JOUR
AU  - Berend, Daniel
TI  - IP-Sets on the Circle
JO  - Canadian journal of mathematics
PY  - 1990
SP  - 575
EP  - 589
VL  - 42
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1990-030-8/
DO  - 10.4153/CJM-1990-030-8
ID  - 10_4153_CJM_1990_030_8
ER  -