*{{cite bookCita libro|last1cognome1=Jefimenko |first1nome1=Oleg D. |yearanno=2011 |titletitolo=Electrostatic Motors: Their History, Types, and Principles of Operation |editionedizione=1st New Revised |publishereditore=Integrity Research Institute |isbn=978-19350234701-935023-47-0}}
* {{cite journalCita pubblicazione|last1cognome1=Jefimenko |first1nome1=Oleg D. |last2cognome2=Walker |first2nome2=David K. |yearanno=1980 |titletitolo=Electrets |journalrivista=[[Physics Teacher]] |volume=18 |issuenumero=9 |pagespp=651–659 |bibcode=1980PhTea..18..651J |doi=10.1119/1.2340651}}
* {{cite journalCita pubblicazione|last1cognome1=Walker |first1nome1=David K. |last2cognome2=Jefimenko |first2nome2=Oleg D. |yearanno=1973 |titletitolo=Volume charge distribution in carnauba wax electrets |journalrivista=[[Journal of Applied Physics]] |volume=44 |issuenumero=8 |pagespp=3459 |bibcode=1973JAP....44.3459W |doi=10.1063/1.1662785}}
*{{cite bookCita libro|last1cognome1=Gross |first1nome1=Bernhard |yearanno=1964 |titletitolo=Charge storage in solid dielectrics; a bibliographical review on the electret and related effects |publishereditore=[[Elsevier]]}}