He was a natural collaborator who also wrote joint papers with Titchmarsh, Ingham, Edmund Landau, Pólya, E M Wright, W W Rogosinski and Marcel Riesz .
Siya ay isang natural na mga tagatulong na din wrote pinagsamang mga papeles sa Titchmarsh, Ingham, Edmund Landau, Pólya, EM Wright, ww Rogosinski at Marcel Riesz.