Jean-Claude Douai, Mohamed Abdallahi Ould Beddi
      Elementary obstruction and non abelian 2-cohomology
      International Journal of Algebra, Vol. 9, 2015, no. 2, 93-99
      http://dx.doi.org/10.12988/ija.2015.514

Copyright © 2015 Jean-Claude Douai and Mohamed Abdallahi Ould Beddi. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.