Gray, J. D.; Morris, S. A. (1978). When is a Function that Satisfies the Cauchy-Riemann Equations Analytic?. The American Mathematical Monthly85 (April 1978). pp. 246–256. JSTOR2321164. doi:10.2307/2321164..
Gray, J. D.; Morris, S. A. (1978). When is a Function that Satisfies the Cauchy-Riemann Equations Analytic?. The American Mathematical Monthly85 (April 1978). pp. 246–256. JSTOR2321164. doi:10.2307/2321164..