1. Note on a theorem of Hilbert
2. Notes on some points in the integral calculus;Hardy GH;LXIT Messenger Math,1928
3. Elementary theorems concerning power series with positive coefficients and moment constants of positive functions;Hardy GH;J fü,r die reine und angewandte Mathematik,1927
4. Notes on some points in the integral calculus;Hardy GH;LX Messenger Math,1925