TY  - JOUR
AU  - Yaroslav Shitov
TI  - Counterexamples to Hedetniemi’s conjecture
JO  - Annals of mathematics
PY  - 2019
SP  - 663
EP  - 667
VL  - 190
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4007/annals.2019.190.2.6/
DO  - 10.4007/annals.2019.190.2.6
LA  - en
ID  - 10_4007_annals_2019_190_2_6
ER  -