@article{AL_2015_54_6_a4,
     author = {U. Andrews and D. I. Dushenin and C. Hill and J. F. Knight and A. G. Melnikov},
     title = {Comparing classes of finite sums},
     journal = {Algebra i logika},
     pages = {748--768},
     publisher = {mathdoc},
     volume = {54},
     number = {6},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2015_54_6_a4/}
}