Bleich HL.  1992.  Charles Babbage and his steam-driven computer.. MD Comput. 9(2):69-73.

Bleich H.  1992.  George Boole, mathematical logic, and the modern computer.. MD Comput. 9(3):136.

Bleich HL.  1995.  An inventor named Nikola Tesla.. MD Comput. 12(2):81-6.

Coletti MH, Bleich HL.  2001.  Medical subject headings used to search the biomedical literature.. J Am Med Inform Assoc. 8(4):317-23.