@article{IVM_2024_5_a3,
     author = {O. L. Kurnyavko and I. V. Shirokov},
     title = {Construction of first-order invariant differential operators},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {37--46},
     year = {2024},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2024_5_a3/}
}