@article{10_2298_FIL2010191A,
     author = {Il Ju An and Eungil Ko and Ji Eun Lee},
     title = {Operator matrices and their {Weyl} type theorems},
     journal = {Filomat},
     pages = {3191 },
     year = {2020},
     volume = {34},
     number = {10},
     doi = {10.2298/FIL2010191A},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/FIL2010191A/}
}