Date: May 15, 2017
Source: Jurnal Matematika "MANTIK"
Publisher: Prodi Matematika UIN Sunan Ampel Surabaya, Universitas Islam Negeri Sunan Ampel
Date: Jun 20, 2016
Source: Jurnal Matematika "MANTIK"
Publisher: Prodi Matematika UIN Sunan Ampel Surabaya, Universitas Islam Negeri Sunan Ampel
Date: Nov 15, 2013
Source: CAUCHY
Publisher: UIN Maulana Malik Ibrahim, Universitas Islam Negeri Maulana Malik Ibrahim