Published in Alytes, in 1990, in volume 8, issue 3-4, pages 61-74

Published in Alytes, in 1990, in volume 8, issue 3-4, pages 75-89

Published in Alytes, in 1990, in volume 8, issue 3-4, pages 90-98

Published in Alytes, in 1990, in volume 8, issue 3-4, pages 99-104

Published in Alytes, in 1990, in volume 8, issue 3-4, pages 105-106

Published in Alytes, in 1990, in volume 8, issue 3-4, pages 107-120