@article{FPM_2000_6_3_a18,
     author = {A. V. Tishchenko},
     title = {A~wreath product of semigroups and varieties of finite index},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {889--902},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2000_6_3_a18/}
}