@misc{N._B._Yengibarian_On,
 author={N. B. Yengibarian and A. Kh. Khachatrian and M. G. Mouradian},
 address={Երևան},
 howpublished={online},
 publisher={Հայաստանի ԳԱԱ},
 title={On Ambartsumian Equation and its Applications},
 type={Հոդված},
 keywords={Physics, Mathematics, Science},
}