@misc{Guo_Z._Multiplicity,
 author={Guo, Z. and Deng, Y.},
 address={Երևան},
 howpublished={online},
 publisher={Հայաստանի ԳԱԱ},
 title={Multiplicity of solutions for a fractional Laplacian equation involving a perturbation},
 type={Հոդված},
 keywords={Մաթեմատիկա},
}