[636] On the vanishing of and spanning sets for Poincaré series for cusp forms

[637] The concentration function of additive functions on shifted primes

[638] Application de la théorie des équations intégrales linéaires aux systèmes d'équations différentielles non linéaires

[639] On the solvability of the diophantine equation$ax$^{2}+$by$^{2}+$cz$^{2}=0 in imaginary Euclidean quadratic fields

[640] Normal forms for real surfaces in C^{2}near complex tangents and hyperbolic surface transformations