@article{FAA_2017_51_2_a6,
     author = {Xiufeng Wu and Junjie Huang and Alatancang Chen},
     title = {Spectra of $3\times 3$ upper triangular operator matrices},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {72--82},
     publisher = {mathdoc},
     volume = {51},
     number = {2},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2017_51_2_a6/}
}