Berdahl, Clarence A. (September 1952). "Review of Presidential Succession". American Political Science Review. 46 (3): 895. doi:10.2307/1952302. JSTOR1952302.
Silva, Ruth C. (February 1949). "History of presidential succession". Michigan Law Review. 47 (4): 451–476. doi:10.2307/1284810. JSTOR1284810.
Bernd, Joseph L. (November 1963). "Review Rum, Religion, and Votes: 1928 Re-examined". Journal of Church and State. 5 (2): 256–258. doi:10.1093/jcs/5.2.256.
Silva, Ruth C. (October 1963). "Making Votes Count". National Civic Review. 52 (9): 489–492. doi:10.1002/ncr.4100520906.
Richard N. Engstrom; Christopher Kenny (December 1, 2002). "The Effects of Independent Expenditures in Senate Elections". Political Research Quarterly. 55 (4): 885–905. doi:10.1177/106591290205500408. S2CID153617908.
Berdahl, Clarence A. (September 1952). "Review of Presidential Succession". American Political Science Review. 46 (3): 895. doi:10.2307/1952302. JSTOR1952302.
Silva, Ruth C. (February 1949). "History of presidential succession". Michigan Law Review. 47 (4): 451–476. doi:10.2307/1284810. JSTOR1284810.
"History of the PPSA". Pennsylvania Political Science Association. Retrieved 19 October 2020.
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Richard N. Engstrom; Christopher Kenny (December 1, 2002). "The Effects of Independent Expenditures in Senate Elections". Political Research Quarterly. 55 (4): 885–905. doi:10.1177/106591290205500408. S2CID153617908.