@article{SM_2008_199_4_a1,
     author = {Ch. K. Gupta and E. I. Timoshenko},
     title = {The test rank of a~soluble product of free {Abelian} groups},
     journal = {Sbornik. Mathematics},
     pages = {495--510},
     publisher = {mathdoc},
     volume = {199},
     number = {4},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2008_199_4_a1/}
}