%0 Journal Article %A Dražen Adamović %A Ozren Perše %T The vertex algebra $m(1)^+$ and certain affine vertex algebras of level $-1$ %J Symmetry, integrability and geometry: methods and applications %D 2012 %V 8 %U http://geodesic.mathdoc.fr/item/SIGMA_2012_8_a39/ %G en %F SIGMA_2012_8_a39