@article{IVM_2021_11_a4,
     author = {E. Tomp\'e Weimbapou and Abdourahman and E. Kengne},
     title = {On delta-extension for a {Noether} operator},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {40--53},
     publisher = {mathdoc},
     number = {11},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2021_11_a4/}
}