Verdi, G. Simon Boccanegra [SR] p1983 labels (A. Boito)
Arrigo Boito, c2008 p. 15 (Enrico Giuseppe Giovanni Boito, b. Feb. 20, 1842, in Padua, Italy) p. 45 (d. June 10, 1918)
Grove music online, April 22, 2013 (Boito, Arrigo (Enrico); born February 20, 1842, Padua; died June 10, 1918, Milan; Italian librettist, composer, poet, and critic)