1. T.T. Brown, "A method of and an apparatus or machine for producing force or motion", British Patent 300311, (1928).
2. T.T. Brown, "Electrostatic motor", US Patent 1974483, (1934).
3. T.T. Brown, "Electrokinetic apparatus", US Patent 2949550, (1960).
4. Website dedicated to BB effect "http://www.biefeldbrown.com/".
5. Jean-Louis Naudin website "http://jnaudin.free.fr/".