@article{NANO_2019_10_6_a1,
     author = {T. H. Rasulov and E. B. Dilmurodov},
     title = {Threshold analysis for a family of $2\times2$ operator matrices},
     journal = {Nanosistemy: fizika, himi\^a, matematika},
     pages = {616--622},
     publisher = {mathdoc},
     volume = {10},
     number = {6},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NANO_2019_10_6_a1/}
}