Concordantia in XXII libros De civitate dei S. Aurelii Augustini: a concordance to the Corpus Christianorum (1995) edition (from the Dombart & Kalb text of 1928 - 1929) and procedures for adaptations to other editions - Cooper, Rodney H. (Alpha - Omega Reihe A, Lexika, Indizes, Konkordanzen zur klassischen Philologie, 1999)