In this paper, we give a partial answer to the problem posed by Y. Ikeda, C. Liu and Y. Tanaka in [5].
@article{4217, title = {A PARTIAL ANSWER TO A QUESTION OF Y. IKEDA, C. LIU AND Y. TANAKA}, journal = {Novi Sad Journal of Mathematics}, volume = {46}, year = {2017}, language = {EN}, url = {http://dml.mathdoc.fr/item/4217} }
Luong Quoc, Tuyen. A PARTIAL ANSWER TO A QUESTION OF Y. IKEDA, C. LIU AND Y. TANAKA. Novi Sad Journal of Mathematics, Tome 46 (2017) . http://gdmltest.u-ga.fr/item/4217/