Published in Phegea, in 1983, in volume 11, issue 2, pages 31-42
Published in Phegea, in 1983, in volume 11, issue 4, pages 81-96
Published in Phegea, in 1983, in volume 11, issue 1, pages 18
Published in Phegea, in 1983, in volume 11, issue 2, pages 47
Published in Phegea, in 1983, in volume 11, issue 3, pages 55-66