ArticleIssue Date2018CitationJOURNAL OF THE KOREAN SOCIETY OF MATHEMATICAL EDUCATION SERIES B-PURE AND APPLIED MATHEMATICS, v.25, no.2, pp.161 - 170PublisherKOREAN SOC MATHEMATICAL EDUCATION
ArticleIssue Date2017CitationJOURNAL OF THE KOREAN SOCIETY OF MATHEMATICAL EDUCATION SERIES B-PURE AND APPLIED MATHEMATICS, v.24, no.3, pp.171 - 178PublisherKOREAN SOC MATHEMATICAL EDUCATION