• 1925: "Definite integrals containing a parameter",
Annals of Mathematics 26(3): 173 to 80 • 1926: "Functions of two variables for which the double integral does not exist",
American Mathematical Monthly 33(3): 142,3 • 1931: "The uniform approximation of a sequence of integrals",
American Journal of Mathematics 53(1): 61 to 71 • 1933: "Sets of k-extent in n-dimensional space",
Transactions of the American Mathematical Society 35(3): 629 to 47 ==References==