Published in Bollettino Malacologico, in 1990, in volume 26, pages 47-52

Published in Bollettino Malacologico, in 1990, in volume 26, pages 57-60

Published in Bollettino Malacologico, in 1990, in volume 26, pages 67

Published in Bollettino Malacologico, in 1990, in volume 26, issue 1-4, pages 19-24

Published in Bollettino Malacologico, in 1990, in volume 26, issue 1-4, pages 37-46

Published in Bollettino Malacologico, in 1990, in volume 26, issue 1-4, pages 53-56

Published in Bollettino Malacologico, in 1990, in volume 26, issue 5-9, pages 73-82

Published in Bollettino Malacologico, in 1990, in volume 26, issue 5-9, pages 83-90

Published in Bollettino Malacologico, in 1990, in volume 26, issue 5-9, pages 91-104

Published in Bollettino Malacologico, in 1990, in volume 26, issue 5-9, pages 105-112

Published in Bollettino Malacologico, in 1990, in volume 26, issue 5-9, pages 113-124

Published in Bollettino Malacologico, in 1990, in volume 26, issue 5-9, pages 125-130

Published in Bollettino Malacologico, in 1990, in volume 26, issue 5-9, pages 131-142

Published in Bollettino Malacologico, in 1990, in volume 26, issue 5-9, pages 143-144

Published in Bollettino Malacologico, in 1990, in volume 26, issue 5-9, pages 145-147

Published in Bollettino Malacologico, in 1990, in volume 26, issue 5-9, pages 148-152