Lijphart, Arend (2003), "Degrees of proportionality of proportional representation formulas", dalam Grofman, Bernard; Lijphart, Arend, Electoral Laws and Their Political Consequences, Agathon series on representation, 1, Algora Publishing, hlm. 170–179, ISBN9780875862675. See in particular the section "Sainte-Lague", hlm. 174–175.