A study of Gel'fand-Shilov spaces of functions of two real variables / by C.A.M. van BerkelThe Fourier-Jacobi transform of analytic functions which are (almost) periodic in the imaginary direction / by C.A.M. van Berkel, J. de GraafGelfand-Shilov spaces of infinitely differentiable functions on the positive real line / by C.A.M. van Berkel, S.J.L. van EijndhovenIntegral transformations and spaces of type S / Cornelis Adrianus Maria van BerkelFractional calculus, Gegenbauer transformations and integral equations / by C.A.M. van Berkel, S.J.L. van Eijndhoven