@unpublished{MC17,
title = {On the best approximation error of energy sparse grids in {$H^1$}},
author = {Bastian Bohn},
note = {Public seminar talk - \url{https://ins.uni-bonn.de/group/neitzel/page/seminar} - Institute for Numerical Simulation, Mathematics of Computation, Seminar Series, Bonn, Germany, November 9},
year = {2017},
}