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Author: Koşan, Muhammet Tamer

• Ecevit, Şule; Koşan, Muhammet Tamer: On rings all of whose modules are retractable. (English). Archivum Mathematicum, vol. 45 (2009), issue 1, pp. 71-74
• Koşan, Muhammet Tamer: $\tau $-supplemented modules and $\tau $-weakly supplemented modules. (English). Archivum Mathematicum, vol. 43 (2007), issue 4, pp. 251-257