%0 Journal Article %A Friedrich, Thomas %T Cocalibrated $G_2$-manifolds with Ricci flat characteristic connection %J Communications in Mathematics %D 2013 %P 1-13 %V 21 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/COMIM_2013__21_1_a0/ %G en %F COMIM_2013__21_1_a0