@misc{Roberto_Barbon_Observations,
 author={Roberto Barbon},
 address={Երևան},
 howpublished={online},
 publisher={ՀՍՍՀ ԳԱ հրատ․},
 title={Observations of the supernova 1959b in NGC 4921},
 type={Հոդված},
 keywords={Astrophysics, Science, Galaxy},
}