Published in Apex (Brussels), in 1992, in volume 7, pages 23-26

Published in Apex (Brussels), in 1992, in volume 7, pages 27-30

Published in Apex (Brussels), in 1992, in volume 7, pages 31-33

Published in Apex (Brussels), in 1992, in volume 7, pages 35-46

Published in Apex (Brussels), in 1992, in volume 7, pages 47-58