Porcu, E., P.Zastavnyi, V., & Bevilacqua, M..  (2017).  Buhmann Covariance Functions, their Compact Supports, and their Smoothness. Dolomites Research Notes on Approximation, 10(1), 33-42. presented at the 09/2017. doi:10.14658/pupj-drna-2017-1-5