@article{SEMR_2022_19_2_a5,
     author = {A. V. Kravchenko and M. V. Schwidefsky},
     title = {On nonstandard quasivarieties of differential groupoids and unary algebras},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {768--783},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {2022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2022_19_2_a5/}
}