@article{DM_1992_4_2_a3,
     author = {N. N. Vakhania},
     title = {Ordering of operations in the case of parallel machines},
     journal = {Diskretnaya Matematika},
     pages = {39--44},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1992_4_2_a3/}
}