@article{CHEB_2019_20_3_a16,
     author = {A. V. Zhuchok},
     title = {Free rectangular $n$-tuple semigroups},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {261--271},
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2019_20_3_a16/}
}