References
- Begehr , H. and Dzhuraev , A. 1997 . An Introduction to several complex variables and partial differential equations .
- Forelli , F. 1977 . Pluriharmonicity in terms of harmonic slices . Math. Scand , 41 : 358 – 364 .
- Krantz , S. 1992 . “ Partial differential equations and complex analysis ” . Boca, Raton : CRC Press .
- Usmanov , Z. 1997 . Generalized Cauchy-Riemann system with a singular point .