Daguin (1878), T. III, p. 573
Fleury-Mathieu (1964), Vol. 6, p. 202, Vol. 7, p. 325
Halliday-Resnick (1979), Vol. II, p. 220
Perucca (1949), Vol. II, p. 600
Ragozzino-Schettino (1985), p. 89