TY  - JOUR
AU  - Majumder, Sujoy
AU  - Mandal, Rajib
TI  - On a result of Zhang and Xu concerning their open problem
JO  - Archivum mathematicum
PY  - 2018
SP  - 65
EP  - 89
VL  - 54
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.5817/AM2018-2-65/
DO  - 10.5817/AM2018-2-65
LA  - en
ID  - 10_5817_AM2018_2_65
ER  -