@article{JAC_1997__6_2_a4,
     author = {Calderbank, A.R. and Sloane, N.J.A.},
     title = {Double circulant codes over $\bbfZ\sb 4$ and even unimodular lattices},
     journal = {Journal of Algebraic Combinatorics},
     pages = {119--131},
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_1997__6_2_a4/}
}