1. New Experiments on Cement;Stern;Chem.-Ztg.,1908
2. Discussions on the Microstructure of Portland Cement;Stern;Z. Anorg. Chem.,1909
3. Crystallization and Gel Formation in the Hardening of Cement;Ambronn;Tonind.-Ztg.,1909
4. Hydration of Portland Cement;Klein;Nat. Bur. Stand. (U.S.), Tech. Pap.,1914