@misc{M._M._Tripathi_Concircular,
 author={M. M. Tripathi},
 address={Երևան},
 howpublished={online},
 publisher={Հայաստանի ԳԱԱ},
 title={Concircular curvature tensor in contact metric manifolds},
 type={Հոդված},
 keywords={Mathematics, Science},
}