00409nam a22001337a 4500 0 0 0 1 LCC PTR 2018-03-01 0 510.5 . 2024-04-30 00:00:00 RS 21484 21484 1225-6951 [ISSN] KYUNGPOOK KYUNGPOOK Mathematical Journal Korea Department of Mathematics, Kyungpook National University c.2017 v. : ill. ; 25 cm. Vol. 57, no. 2(June.2017)- ; Vol. 57, no.3(September.2017)- Periodicals RS