@article{MABA_2003_17_3-4_a4,
     author = {Vsevolod Ivanov Ivanov},
     title = {Limit {Extremal} {Problems}},
     journal = {Mathematica balkanica},
     pages = {221},
     publisher = {mathdoc},
     volume = {17},
     number = {3-4},
     year = {2003},
     url = {http://geodesic.mathdoc.fr/item/MABA_2003_17_3-4_a4/}
}