JournalsemVol. 63, No. 4Volume 63, No. 4 (2008) Elemente der Mathematikpp. 153–164Catalan numbers, primes, and twin primesChristian AebiGrant Cairnspp. 165–172A new line associated with the triangleMowaffaq HajjaMargarita Spirovapp. 173–183Géométrie plane: Une axiomatique centrée sur la distanceChristoph Solandpp. 184–188An interesting consequence of the Heisenberg constructionB. Surypp. 189–193Aufgabenpp. 194–196Rezensionen