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