H. Davenport: Problemes dempilement et de decouvrement.- L.J. Mordell: Equazioni diofantee.- C.A. Rogers: The geometry of numbers.- P. Erdos: Some problems on the distribution of prime numbers.- G. Ricci: Sul reticolo dei punti aventi per coordinate i numeri primi."

Proceedings of the Second International Workshop on Epidemiology and Prevention of Gallstone Disease, held in Rome, December 4-5, 1989