Schindler, P., and M. Reinert. “Das Potential Der Pb(-Hg),PbF2-Elektrode in KF–KNO3-Lösungen Konstanter lonenstärke”. CHIMIA, vol. 15, no. 11, Nov. 1961, p. 534, https://doi.org/10.2533/chimia.1961.534.