@article{IIGUM_2018_24_a7,
     author = {L. Khadkhuu and D. Tsedenbayar},
     title = {On the numerical range and numerical radius of the {Volterra} operator},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {102--108},
     publisher = {mathdoc},
     volume = {24},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2018_24_a7/}
}