TY  - JOUR
AU  - Sierksma, Gerard
TI  - Convexity on unions of sets
JO  - Compositio Mathematica
PY  - 1980
SP  - 391
EP  - 400
VL  - 42
IS  - 3
PB  - Sijthoff et Noordhoff International Publishers
UR  - http://www.numdam.org/item/CM_1980__42_3_391_0/
LA  - en
ID  - CM_1980__42_3_391_0
ER  -