@article{AL_2020_59_6_a0,
     author = {S. V. Gusev},
     title = {Standard elements of the lattice of monoid varieties},
     journal = {Algebra i logika},
     pages = {615--626},
     year = {2020},
     volume = {59},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2020_59_6_a0/}
}