@article{rifa_product_2010-1, title = {Product {Perfect} {Z2Z4}-linear codes in {Steganography}}, volume = {abs/1003.4852}, url = {http://arxiv.org/abs/1003.4852}, journal = {CoRR}, author = {Rifà, Josep and Ronquillo, Lorena}, year = {2010}, note = {\_eprint: 1003.4852} }