@article{MZM_2009_86_6_a12,
     author = {M. S. Eryashkin and S. M. Skryabin},
     title = {The {Largest} {Hopf} {Subalgebra} of a {Bialgebra}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {942--946},
     publisher = {mathdoc},
     volume = {86},
     number = {6},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2009_86_6_a12/}
}