TY  - DATA
AU  - Shimakura, Norio,
TI  - Partial differential operators of elliptic type 
T2  - Translations of Mathematical Monographs, 
SN  - 9781470445119 (online)
PY  - 1992///
CY  - Providence, R.I.
PB  - American Mathematical Society
KW  - Hypoelliptic operators
N1  - Rev. translation of: Daenkei henbibun sayoso. 1978; Includes bibliographical references (p. 275-281) and index
UR  - https://doi.org/10.1090/mmono/099
ER  -