@article{80e73c20ebfa45fe89550ee2ac18bcb6,
title = "Schoenberg's theorem for real and complex Hilbert spheres revisited",
keywords = "Positive definite functions, Spherical harmonics for real and complex spheres, Gegenbauer polynomials, Disc polynomials",
author = "Christian Berg and Peron, {Ana P.} and Emilio Porcu",
year = "2018",
month = apr,
doi = "10.1016/j.jat.2018.02.003",
language = "English",
volume = "228",
pages = "58--78",
journal = "Journal of Approximation Theory",
issn = "0021-9045",
publisher = "Academic Press",
}