@article{ZR_2022_20_28_a1,
     author = {Dragan S. Djordjevi\'c and Milica Z. Kolund\v{z}Ija and Sonja Radosavljevi\'c and Dijana Mosi\'c},
     title = {A {Survey} on $2\times2$ {Operator} {Matrices} and {Their} {Applications}},
     journal = {Zbornik radova},
     pages = {7 },
     publisher = {mathdoc},
     volume = {20},
     number = {28},
     year = {2022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZR_2022_20_28_a1/}
}