1
Millar R F. Singularities of Solutions to Exterior Analytic Boundary Value Problems for the Helmholtz Equation in Three Independent Variables. II: The Axisymmetric Boundary[J]. Siam Journal on Mathematical Analysis, 2006, 10(1): 131-156.
2
De Monvel L B. Hypoelliptic operators with double characteristics and related pseudo-differential operators[J]. Communications on Pure and Applied Mathematics, 2010, 27(5): 585-639.
3
Sjostrand J. Parametrices for pseudodifferential operators with multiple characteristics[J]. Arkiv för Matematik, 1974: 85-130.
4
Nishitani T, Tamura M. A class of Fourier integral operators with complex phase related to the Gevrey classes[J]. Journal of Pseudo-differential Operators and Applications, 2010, 1(3): 255-292.
5
Stephan Rempel · Bertwolgang Schulze. Parametrices and Boundary Symbolic Calculus for Elliptic Boundary Problems without the Transmission Property. 1982.
6
De Monvel L B, Treves F. On a class of pseudodifferential operators with double characteristics[J]. Inventiones Mathematicae, 1974, 24(1): 1-34.
7
Winzell B. A boundary value problem with an oblique derivative[J]. Communications in Partial Differential Equations, 2007, 6(3): 305-328.
8
J J Duistermaat · J Sjstrand. A global construction for pseudo-differential operators with non-involutive characteristics. 1973.
9
Guan P, Sawyer E T. Regularity estimates for the oblique derivative problem[J]. Annals of Mathematics, 1993, 137(1): 1-70.
10
Yamamoto K. Singularities of solutions to the boundary value problems for elastic and Maxwell\u0027s equations[C]., 1988, 14(1): 119-163.