@article{PIM_1982_N_S_32_46_a18,
     author = {Du\v{s}an Miki\v{c}i\'c and Dejan Popovi\'c},
     title = {About {The} {Fundamental} {Matrix} {Of} {The} {Linear} {Nonstationary} {System}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {119 },
     publisher = {mathdoc},
     volume = {_N_S_32},
     number = {46},
     year = {1982},
     url = {http://geodesic.mathdoc.fr/item/PIM_1982_N_S_32_46_a18/}
}