Lennon, Alison J.; Utama, Roland Y.; et al. (2008). "Forming openings to semiconductor layers of silicon solar cells by inkjet printing". Solar Energy Materials and Solar Cells. 92 (11): 1410–1415. Bibcode:2008SEMSC..92.1410L. doi:10.1016/j.solmat.2008.05.018.
Lennon, Alison J.; Utama, Roland Y.; et al. (2008). "Forming openings to semiconductor layers of silicon solar cells by inkjet printing". Solar Energy Materials and Solar Cells. 92 (11): 1410–1415. Bibcode:2008SEMSC..92.1410L. doi:10.1016/j.solmat.2008.05.018.
Howard, Robert (2009). Connecting the dots : my life and inventions, from X-rays to death rays. New York, NY: Welcome Rain. p. 196. ISBN978-1-56649-957-6. OCLC455879561.
Webster, Edward. (2000). Print unchained : fifty years of digital printing, 1950-2000 and beyond : a saga of invention and enterprise. West Dover, VT: DRA of Vermont, Inc. pp. 53–54. ISBN0-9702617-0-5. OCLC46611664.
Cooper, Kenneth G. (2001). Rapid prototyping technology : selection and application. New York: Marcel Dekker. pp. 26–43. ISBN0-8247-0261-1. OCLC45873626.