Paulo Simeão Carvalho, Adriano Sampaio e Sousa, Ideal and Real Capacitors: How their Behaviour Affect Energy Efficiencies, in Capacitors: Theory, Types and Applications, Editor: Alexander L. Schulz, ISBN 978-1-61668-972-8, Nova Science Publishers, Inc., New York (2011), pp. 41-58.
Paulo Simeão Carvalho, Adriano Sampaio e Sousa, Ideal and Real Capacitors: How their Behaviour Affect Energy Efficiencies, in Encyclopedia of Electrochemistry Research , Editor: Jonathan R. Coleman, ISBN 978-1-61470-096-8, vol. 3, Nova Science Publishers, Inc., New York (2012), pp. 1169-1182.