Controllability on real reductive Lie groups
In: Mathematische Zeitschrift, Vol. 1992, page 463-466
A convexity theorem for boundaries of ordered symmetric spaces
In: Canadian journal of mathematics, Vol. 1994, page 746-757
Group theoretical aspects of Gödel's cosmological model
In: Jahrbuch der Gödel Gesellschaft, Vol. 1991, page 3-11
Infinitesimally generated subsemigroups of motion groups
In: Rocky Mountain Journal of Mathematics, Vol. 1991, page 865-878
Invariant Lorentzian orders on simply connected Lie groups
In: Arkiv för Matematik, Vol. 1988, page 107-115
Maximal semigroups and controllability in products of Lie groups
In: Archiv der Mathematik, Vol. 1987, page 189-195
The Mayer-Vietoris and the Puppe sequences in K-theory for C*-Algebras
In: Studia mathematica <Warszawa>, Vol. 1986, page 97-104
A note on Howe's oscillator semigroup
In: Annales de l'Institut Fourier, Vol. 1989, page 663-688
