Published in Phegea, in 1992, in volume 20, issue 1, pages 1-4

Published in Phegea, in 1992, in volume 20, issue 1, pages 11-34

Published in Phegea, in 1992, in volume 20, issue 1, pages 35-39

Published in Phegea, in 1992, in volume 20, issue 1, pages 41-44

Published in Phegea, in 1992, in volume 20, issue 2, pages 45-60

Published in Phegea, in 1992, in volume 20, issue 2, pages 61-67

Published in Phegea, in 1992, in volume 20, issue 2, pages 69-73

Published in Phegea, in 1992, in volume 20, issue 2, pages 75-78

Published in Phegea, in 1992, in volume 20, issue 2, pages 79-80

Published in Phegea, in 1992, in volume 20, issue 2, pages 80

Published in Phegea, in 1992, in volume 20, issue 2, pages 81-94

Published in Phegea, in 1992, in volume 20, issue 2, pages 95-103

Published in Phegea, in 1992, in volume 20, issue 3, pages 105-107

Published in Phegea, in 1992, in volume 20, issue 3, pages 109-112

Published in Phegea, in 1992, in volume 20, issue 3, pages 113-114

Published in Phegea, in 1992, in volume 20, issue 3, pages 115-119

Published in Phegea, in 1992, in volume 20, issue 3, pages 121-123

Published in Phegea, in 1992, in volume 20, issue 3, pages 125-128

Published in Phegea, in 1992, in volume 20, issue 4, pages 129-130

Published in Phegea, in 1992, in volume 20, issue 4, pages 131-135

Published in Phegea, in 1992, in volume 20, issue 4, pages 137-150

Published in Phegea, in 1992, in volume 20, issue 4, pages 151-154

Published in Phegea, in 1992, in volume 20, issue 4, pages 155-159