TY  - JOUR
AU  - Chen, Yin
TI  - Relations between modular invariants of a vector and a covector in dimension two
JO  - Canadian mathematical bulletin
PY  - 2021
SP  - 820
EP  - 827
VL  - 64
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/S0008439520000855/
DO  - 10.4153/S0008439520000855
ID  - 10_4153_S0008439520000855
ER  -