Edwin Holmes (inventor) (English Wikipedia)

Karen C. S. Donnelly (1992). Domestic security: the Holmes burglar alarm telegraph, 1853–1876. Graduate School of Arts and Sciences, University of Pennsylvania. Retrieved 2 September 2011. online text

books.google.com

Karen C. S. Donnelly (1992). Domestic security: the Holmes burglar alarm telegraph, 1853–1876. Graduate School of Arts and Sciences, University of Pennsylvania. Retrieved 2 September 2011. online text
Seungmug Lee; Rutgers The State University of New Jersey – Newark (2008). The impact of home burglar alarm systems on residential burglaries. pp. 26–. ISBN 978-0-549-79130-0. Retrieved 2 September 2011.^{[permanent dead link‍]}
Edwin Thomas Holmes (September 2010). A Wonderful Fifty Years. Kessinger Publishing, LLC. ISBN 978-1-166-49973-0. Retrieved 2 September 2011.
IFPO (10 March 2010). The Professional Protection Officer: Practical Security Strategies and Emerging Trends. Butterworth-Heinemann. pp. 90–. ISBN 978-1-85617-746-7. Retrieved 2 September 2011.

John Fischer, DGA Security Systems, Inc. Our Father’s Beginning Archived 2012-03-31 at the Wayback Machine. Updated May 5, 2010
John Fischer, DGA Security Systems, Inc. Protecting the Protection? Archived 2012-03-31 at the Wayback Machine. Updated May 5, 2010

A. R. Pope "Improvement in Electro-Magnetic Alarms" U.S. patent 9,802 Issued October 21, 1853 (Middle name of the author misprinted on Google)

John Fischer, DGA Security Systems, Inc. Our Father’s Beginning Archived 2012-03-31 at the Wayback Machine. Updated May 5, 2010
John Fischer, DGA Security Systems, Inc. Protecting the Protection? Archived 2012-03-31 at the Wayback Machine. Updated May 5, 2010