Projective transformations of a plane
I. Burban, W. Duma, U Sviti Mathematyky 4 (1998).

Projective transformations of a plane and three-dimensional space
I. Burban, W. Duma, U Sviti Mathematyky 4 (1998).

Rational parameterization of algebraic curves
I. Burban, U Sviti Mathematyky 4 (1998).

Invariant Cones in Real Representations
J. Hilgert, K.-H. Neeb, in: J. Hilgert, J.D. Lawson, K.-H. Neeb, E.B. Vinberg (Eds.), Positivity in Lie Theory: Open Problems, De Gruyter, Berlin, 1998.

Reproducing Kernels on Vector Bundles
J. Hilgert, W. Bertram, in: H.D. Doebner, V. Dobrev, J. Hilgert (Eds.), Lie Theory and Its Applications in Physics, World Scientific, Singapore, 1998.

Hardy Spaces and Analytic Continuation of Bergman Spaces
J. Hilgert, W. Bertram, Bull. Math. Soc. Francaise 126 (1998) 435–482.

Poisson Lie Groups and Non-Linear Convexity Theorems
J. Hilgert, K.-H. Neeb, Math. Nachr. 191 (1998) 153–187.

Lie Theory and its Applcations in Physics II
J. Hilgert, H.-D. Doebner, V.K. Dobrev, eds., Lie Theory and Its Applcations in Physics II, World Scientific, 1998.

Positivity in Lie Theory
J. Hilgert, J.D. Lawson, K.-H. Neeb, E.B. Vinberg, eds., Positivity in Lie Theory, De Gruyter, , 1998.

Wachstumsverhalten von Lösungen der $\'6fverline\'70artial$-Gleichung auf Pseudo-Siegel-Gebieten
K. Hesse, Wachstumsverhalten von Lösungen der $verline\'70artial$-Gleichung auf Pseudo-Siegel-Gebieten, 1998.