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

[647] A geometric proof of Mostow's rigidity theorem for groups of divergence type

[648] On Toeplitz forms and stationary processes

[649] The Radon transform on Euclidean spaces, compact two-point homogeneous spaces and Grassmann manifolds

[650] Non-unitary dual spaces of groups