Naval Research Laboratory (May 25, 1949). "Geiger Counter Tubes"(PDF). dtic.mil. Archived(PDF) from the original on November 17, 2021. Retrieved 2019-09-09.
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US 3892990, Mitrofanov, Nicolas, "Bromine-quenched high temperature g-m tube with passivated cathode", published 1975-07-01, issued 1972-07-31, assigned to Kewanee Oil Co.
US 4359661, Mitrofanov, Nicolas, "Geiger-Mueller tube with tungsten liner", published 1982-11-16, issued 1982-11-16, assigned to The Harshaw Chemical Co.
Naval Research Laboratory (May 25, 1949). "Geiger Counter Tubes"(PDF). dtic.mil. Archived(PDF) from the original on November 17, 2021. Retrieved 2019-09-09.