1. Theory of Bessel potentials. I;Aronszajn;Ann. Inst. Fourier (Grenoble),1961
2. Fractional integration and fractional differentiation for Jacobi expansions;Balderrama;Divulg. Mat.,2007
3. Fractional integration and fractional differentiation for d-dimensional Jacobi expansions;Balderrama,2008
4. A choice of Sobolev spaces associated with ultraspherical expansions;Betancor;Publ. Math.,2010
5. Sobolev spaces associated to the harmonic oscillator;Bongioanni;Proc. Indian Acad. Sci. Math. Sci.,2006