@article{VTAMU_2020_25_129_a4,
     author = {V. I. Fomin},
     title = {About unbounded complex operators},
     journal = {Vestnik rossijskih universitetov. Matematika},
     pages = {57--67},
     publisher = {mathdoc},
     volume = {25},
     number = {129},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTAMU_2020_25_129_a4/}
}