1. Wick and anti-Wick symbols of operators;Berezin;Mat. Sb. (N.S.),1971
2. Interpolation Spaces, An Introduction;Bergh,1976
3. P. Boggiatto, E. Cordero, Anti-Wick quantization of tempered distributions, in: H.G.W. Begehr, R.P. Gilbert, M.W. Wong (Eds.), Advances in Analysis, World Scientific, 2003, pp. 655–662.
4. P. Boggiatto, E. Cordero, K. Gröchenig, Generalized Anti–Wick operators with symbols in distributional Sobolev spaces, preprint, 2002.
5. Decompositions of functions as sums of elementary functions;Bonsall;Quart. J. Math. Oxford Ser. (2),1986