[Dong, Yueping] Cent China Normal Univ, Sch Math & Stat, Wuhan 430079, Hubei, Peoples R China.
[Dong, Yueping; Takeuchi, Yasuhiro] Aoyama Gakuin Univ, Coll Sci & Engn, Sagamihara, Kanagawa 2525258, Japan.
[Sen, Moitri] Natl Inst Technol Patna, Dept Math, Patna 800005, Bihar, India.
[Banerjee, Malay] Indian Inst Technol Kanpur, Dept Math & Stat, Kanpur 208016, Uttar Pradesh, India.
[Nakaoka, Shinji] JST PRESTO, Kawaguchi, Saitama 3320012, Japan.