1. Gülbaran, E., Bundesrepublik Deutschland, Patent No. 1,024,269.
2. Gülbaran, E., U.S. Patent No. 3,135,631.
3. Gülbaran, E.,Das Leder 6:102 (1955).
4. Gülbaran, E., and H.S. Gülbaran,J. Amer. Oil Chem. Soc. 58:729 (1981).
5. Gülbaran, H.S.,Extraction of Corn Germ and Corn Germ Press Product by a New Extraction System, PhD Thesis, Istanbul Technical University (1977).