3D global simulations of a cosmic-ray-driven dynamo in dwarf galaxies H. Siejkowski, K. Otmianowska-Mazur, M. Soida, D. J. Bomans and M. Hanasz A&A, 562 (2014) A136 Published online: 20 February 2014 DOI: 10.1051/0004-6361/201220367