@article{MT_2022_25_2_a9,
     author = {A. G. Tumanyan},
     title = {A priori estimates and {Fredholm} criteria for a class of regular hypoelliptic operators},
     journal = {Matemati\v{c}eskie trudy},
     pages = {220--240},
     publisher = {mathdoc},
     volume = {25},
     number = {2},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2022_25_2_a9/}
}