Date: Oct 30, 2016
Source: Jurnal Matematika "MANTIK"
Publisher: Prodi Matematika UIN Sunan Ampel Surabaya, Universitas Islam Negeri Sunan Ampel
Date: Nov 18, 2015
Source: Jurnal Matematika "MANTIK"
Publisher: Prodi Matematika UIN Sunan Ampel Surabaya, Universitas Islam Negeri Sunan Ampel