@article{TDM_2003_7_a2,
     author = {M. M. Glukhov},
     title = {Investigation of residue rings of biquadratic extensions of an integer number ring and public key schemes},
     journal = {Trudy po diskretnoj matematike},
     pages = {31--55},
     year = {2003},
     volume = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TDM_2003_7_a2/}
}