@misc{Alexanian_A._A._On,
 author={Alexanian, A. A. and A. V. Soghoyan},
 address={Երևան},
 howpublished={online},
 publisher={ՀՀ ԳԱԱ հրատ.},
 title={On NP-completeness of Some Permutation Generation Problems},
 type={Հոդված},
 keywords={Mathematics, Science},
}