Strictly positive definite functions on the complex Hilbert sphere. - Xingping Sun; Valdir Antonio Menegatto (Adv. Comput. Math., 1999)

Strictly positive definite kernels on subsets of the complex plane. - Valdir Antonio Menegatto; C. P. Oliveira; A. P. Peron (Comput. Math. Appl., 2006)

Integral operators on the sphere generated by positive definite smooth kernels. - José Claudinei Ferreira; Valdir Antonio Menegatto; A. P. Peron (J. Complex., 2008)

Integral operators generated by multi-scale kernels. - Thaís Jordão; Valdir Antonio Menegatto (J. Complex., 2010)

Exact point-distributions over the complex sphere. - Valdir Antonio Menegatto; C. P. Oliveira; A. P. Peron (Des. Codes Cryptogr., 2011)

Eigenvalue decay of positive integral operators on the sphere. - M. H. Castro; Valdir Antonio Menegatto (Math. Comput., 2012)

Sharp estimates for eigenvalues of integral operators generated by dot product kernels on the sphere. - Douglas Azevedo; Valdir Antonio Menegatto (J. Approx. Theory, 2014)

Strict positive definiteness of multivariate covariance functions on compact two-point homogeneous spaces. - Rafaela N. Bonfim; Valdir Antonio Menegatto (J. Multivar. Anal., 2016)

Strictly positive definite multivariate covariance functions on spheres. - Jean Carlo Guella; Valdir Antonio Menegatto; Emilio Porcu (J. Multivar. Anal., 2018)