TY  - JOUR
AU  - Albert, Michael
AU  - Jelínek, Vít
AU  - Opler, Michal
TI  - Two examples of Wilf-collapse
JO  - Discrete mathematics & theoretical computer science
PY  - 2020-2021
VL  - 22
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.46298/dmtcs.5986/
DO  - 10.46298/dmtcs.5986
LA  - en
ID  - DMTCS_2021_22_2_a7
ER  -