Spencer D C. Overdetermined systems of linear partial differential equations[J]. Bulletin of the American Mathematical Society, 1969, 75(2): 179-239.
2
J J Kohn. Subellipticity of the $$\bar \partial$$ -Neumann problem on pseudo-convex domains: Sufficient conditionsproblem on pseudo-convex domains: Sufficient conditions. 1979.
3
Folland G B. The tangential Cauchy-Riemann complex on spheres[J]. Transactions of the American Mathematical Society, 1972: 83-133.
4
Golubitsky O, Kondratieva M V, Ovchinnikov A, et al. A Bound for Orders in Differential Nullstellensatz[J]. Journal of Algebra, 2008, 322(11): 3852-3877.
5
Munoz J, Muriel F, Rodriguez J C, et al. A remark on Goldschmidt\u0027s theorem on formal integrability[J]. Journal of Mathematical Analysis and Applications, 2001, 254(1): 275-290.
6
Makhlouf Derridj. Ingalits priori et estimation sous-elliptique pour $$\bar \partial $$ dans des ouverts non pseudoconvexes. 1980.
7
W J Sweeney. A condition for subellipticity in Spencer's Neumann problem. 1976.
8
Mackichan B. A generalization to overdetermined systems of the notion of diagonal operators[J]. Acta Mathematica, 1971.
9
Derridj M. Domaines a estimation maximale[J]. Mathematische Zeitschrift, 1991, 208(1): 92-100.
10
Samborskii S N. Coercive boundary-value problems for overdetermined systems (parabolic problems)[J]. Ukrainian Mathematical Journal, 1985, 36(4): 385-390.