References
- Courant , R. and Hilbert , D. 1962 . Methods of Mathematical Physics, Volume II, Partial Differential Equations . Wiley Interscience ,
- Gilbarg , D. and Hömander , L. 1980 . Intermediate Schauder estimates . Arch. Rational Mech. Anal , 74 : 297 – 318 .
- Gilbarg , D. and Trudinger , N.S. 1983 . Elliptic Partial Differential Equations of Second Order .
- Hardy , G.H. and Littlewood , J.E. 1980 . Some Properties of fractional integrals I . Math.Zeit , 27 : 403 – 439 .
- Hardy , G.H. and Littlewood , J.E. 1932 . Theorems concerning mean values of analytic or harmonic functions . Quart. J . of Math , 3 : 221 – 256 . oxford
- Hile , G.N. and Yeh , R.Z. 1985 . Phragmen Lindelöf principles for solutions of eliptic differential inequalities . J. Math. Anal. Appl , 107 : 478 – 497 .
- Kellogg , O.D. 1931 . On derivatives of harmonzc functions at the boundary . Trans. Amer. Math. Soc , 33 : 486 – 510 .
- Pommerenke , Ch . Boundary Behaviour of Conformal Maps .
- Stein , E.M. 1970 . “ Singular Integrals and Differentiability Properties of Functions ” . Princeton, NJ : Princeton University Press .
- Troianiello , G.M. 1992 . Estimates of the Caccioppoli Schauder type in weighted function spaces . Trans. Amer. Math. Soc , 334 : 551 – 573 .