@article{TM2_2002_V_2_a0,
     author = {Vladimir Tihomirov},
     title = {Extremal {Problems} - {Past} and {Present}},
     journal = {The Teaching of Mathematics},
     pages = {59 },
     publisher = {mathdoc},
     volume = {V},
     number = {2},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM2_2002_V_2_a0/}
}