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.

Leopardi, P.  (2013).  Discrepancy, separation and Riesz energy of finite point sets on compact connected Riemannian manifolds.  Dolomites Research Notes on Approximation, 6(Special_Issue), 120-129. presented at the 09/2013. doi:10.14658/pupj-drna-2013-Special_Issue-12