@article{PDMA_2012_5_a30,
     author = {G. I. Shushuev},
     title = {Optimal linear approximations for {Feistel} networks. {Estimation} for the resistance of the cipher {SMS4} to linear cryptanalysis},
     journal = {Prikladnaya Diskretnaya Matematika. Supplement},
     pages = {58--60},
     publisher = {mathdoc},
     number = {5},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDMA_2012_5_a30/}
}