@article{MABA_2005_19_3-4_a1,
     author = {Afgan Aslanov},
     title = {Existence of the {Minimum} and {Maximum} of {Two} {Self-Adjoint} {Operators}},
     journal = {Mathematica balkanica},
     pages = {255},
     publisher = {mathdoc},
     volume = {19},
     number = {3-4},
     year = {2005},
     url = {http://geodesic.mathdoc.fr/item/MABA_2005_19_3-4_a1/}
}