1. Die Frage der endlich vielen Schritte in der Theorie der Polynomideale;Hermann;Math. Ann.,1926
2. A. Iarrobino, Vector spaces of forms I: Ancestor ideals of a vector space of forms, to appear.
3. Some properties of enumeration in the theory of modular systems;Macaulay,1927
4. On a theorem due to F. S. Macaulay;Whipple,1928