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Druyvesteyn, M. J.; Penning, F. M. (1 April 1940). "The Mechanism of Electrical Discharges in Gases of Low Pressure". Reviews of Modern Physics. 12 (2): 87–174. Bibcode:1940RvMP...12...87D. doi:10.1103/RevModPhys.12.87.
Vries, Marc de; Boersma, Kees (2005). 80 years of research at the Philips Natuurkundig Laboratorium (1914–1994): the role of the Nat. Lab. at Philips. Amsterdam: Pallas Publications. ISBN978-1423785392. OCLC298788501.