@article{TVIM_2021_3_a1,
     author = {S. M. Tashpulatov and R. T. Parmanova},
     title = {Structure of essential spectra and discrete spectrum of the energy operator of four-electron systems in the impurity {Hubbard} model. {Quintet} state. {One-dimensional} case},
     journal = {Taurida Journal of Computer Science Theory and Mathematics},
     pages = {14--34},
     publisher = {mathdoc},
     number = {3},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TVIM_2021_3_a1/}
}