1. ABC of Capacitors n.d..
2. Theory of ragone plots;Christen;J. Power Sources,2000
3. Ultracapacitors bring portability to power;Dispennette;Power Electron. Technol.,2005
4. Emerson Network Power n.d. "Capacitors Age and Capacitors Have an End of Life," Emerson Network Power.
5. A review of degradation behavior and modeling of capacitors;Gupta,2018