@article{DAN_1987_294_4_a0,
     author = {V. I. Burenkov and K. R. Maman},
     title = {Local and global estimates for the derivatives of the solutions of inhomogeneous hypoelliptic equations},
     journal = {Doklady Akademii Nauk},
     pages = {777--781},
     publisher = {mathdoc},
     volume = {294},
     number = {4},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_294_4_a0/}
}