1. Carstoiu, J. (1967), “Essay on fundamentals of electrodynamics of moving continuous media and applications”, J. Math. Pures et Appl, No. 46, pp. 215‐48.
2. Kline, M. (1980), Mathematics: the Loss of Certainty, Oxford University Press Inc., New York, NY.
3. Sewell, W. E. (1942), Degree of Approximation by Polynomials in the Complex Domain, Princeton University Press, Princeton, NJ.
4. Wu, X. (1957), “Completeness of sets of functions”, Acta Mathematics Sinica, No. 4, pp. 477‐91.
5. Wu, X. (1957), “Some properties of analytic function omitting two values”, Revue de Mathématiques Pures et Appliquées, No. 2, pp. 145‐50.