TY  - JOUR
AU  - Liu, Hailin
AU  - Lou, Bengong
AU  - Ling, Bo
TI  - Tetravalent half-arc-transitive graphs of order $p^2q^2$
JO  - Czechoslovak Mathematical Journal
PY  - 2019
SP  - 391
EP  - 401
VL  - 69
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2019.0335-17/
DO  - 10.21136/CMJ.2019.0335-17
LA  - en
ID  - 10_21136_CMJ_2019_0335_17
ER  -