TY  - JOUR
TI  - BCM volume 63 Issue 4 Cover and Back matter
JO  - Canadian mathematical bulletin
PY  - 2020
SP  - b1
EP  - b2
VL  - 63
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/S0008439520000417/
DO  - 10.4153/S0008439520000417
ID  - 10_4153_S0008439520000417
ER  -