1. B. Joricke, ‘‘On a multidimensional analog of Privalov’s theorem,’’ Math. Nachr. 107, 221–233 (1982). doi 10.1002/mana.19821070117
2. S. M. Nikol’ski, Approximation of Functions of Several Variables and Embedding Theorems (Nauka, Moscow, 1969).
3. V. S. Vladimirov, Methods of the Theory of Functions of Several Complex Variables (MIT Press, Cambridge, 1966).
4. B. Malgrange, Ideals of Differentiable Functions (Oxford Univ. Press, Oxford, 1966).