@article{AA_1990_2_5_a1,
     author = {A. I. Barvinok},
     title = {The method of statistical sums in problems of combinatorial optimization},
     journal = {Algebra i analiz},
     pages = {63--79},
     publisher = {mathdoc},
     volume = {2},
     number = {5},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1990_2_5_a1/}
}