@article{MABA_2011_25_5_a3,
     author = {A. Denic},
     title = {Application of exact and heuristic methods to magic square problem},
     journal = {Mathematica balkanica},
     pages = {491},
     publisher = {mathdoc},
     volume = {25},
     number = {5},
     year = {2011},
     url = {http://geodesic.mathdoc.fr/item/MABA_2011_25_5_a3/}
}