@article{MABA_1990_4_1_a3,
     author = {Lawrence A. Fialkow and Hector Salas},
     title = {Majorization, {Factorization} and {Systems} of {Linear} {Operator} {Equations}},
     journal = {Mathematica balkanica},
     pages = {22},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {1990},
     url = {http://geodesic.mathdoc.fr/item/MABA_1990_4_1_a3/}
}