Leopardi, P., Sommariva, A., & Vianello, M..  (2017).  Optimal polynomial meshes and Caratheodory-Tchakaloff submeshes on the sphere. Dolomites Research Notes on Approximation, 10(Special_Issue), 18-24. presented at the 05/2017.

Bos, L., & De Marchi, S..  (2011).  On Optimal Points for Interpolation by Univariate Exponential Functions. Dolomites Research Notes on Approximation, 4(1), 8-12. presented at the 09/2011. doi:10.14658/pupj-drna-2011-1-2

Fasshauer, G.  (2008).  ?Optimal? Shape Parameters for RBF Approximation Methods.  Dolomites Research Notes on Approximation, 1(1). presented at the 09/2008.