@article{ZNSL_2000_272_a13,
     author = {M. I. Kyurshina},
     title = {Cancellation law for $T$-forms},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {238--241},
     year = {2000},
     volume = {272},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2000_272_a13/}
}