Statement of Retraction

This article refers to:

Murley Groups and the Torsion-Freeness of Ext

We, the Editor and Publisher of Communications in Algebra, are retracting the following article:

Ulrich Albrecht & Stefan Friedenberg “Murley Groups and the Torsion-freeness of Ext” Communications in Algebra 43.3 (2015): 1194–1206 http://dx.doi.org/ 10.1080/00927872.2013.865043

We are now cognizant that this article was previously published in the Journal of Algebra:

Ulrich Albrecht & Stefan Friedenberg “Murley Groups and the Torsion-freeness of Ext” Journal of Algebra 331.1 (2011): 378–387 http://dx.doi.org/10.1016/ j.jalgebra.2011.01.005

The retracted article will remain online to maintain the scholarly record, but it will be digitally watermarked on each page as RETRACTED.