Publisher： 国家哲学社会科学学术期刊数据库

E-ISSN： 1672-1969|volume|12|27-27

ISSN： 1672-1969

Source： 数学之友, Vol.volume, Iss.12, 2017-01, pp. : 27-27

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next