Published in Bollettino Malacologico, in 1989, in volume 24, pages 155-160

Published in Bollettino Malacologico, in 1989, in volume 24, pages 189-204

Published in Bollettino Malacologico, in 1989, in volume 24, pages 261-268

Published in Bollettino Malacologico, in 1989, in volume 24, issue 9-12, pages 152-153

Published in Bollettino Malacologico, in 1989, in volume 24, issue 9-12, pages 154

Published in Bollettino Malacologico, in 1989, in volume 24, issue 9-12, pages 173-178

Published in Bollettino Malacologico, in 1989, in volume 24, issue 9-12, pages 215-222

Published in Bollettino Malacologico, in 1989, in volume 25, issue 1-4, pages 1-22

Published in Bollettino Malacologico, in 1989, in volume 25, issue 1-4, pages 23-62

Published in Bollettino Malacologico, in 1989, in volume 25, issue 1-4, pages 63-76

Published in Bollettino Malacologico, in 1989, in volume 25, issue 1-4, pages 85-90

Published in Bollettino Malacologico, in 1989, in volume 25, issue 1-4, pages 91-96

Published in Bollettino Malacologico, in 1989, in volume 25, issue 1-4, pages 133-135

Published in Bollettino Malacologico, in 1989, in volume 25, issue 5-8, pages 137-148

Published in Bollettino Malacologico, in 1989, in volume 25, issue 5-8, pages 183-204

Published in Bollettino Malacologico, in 1989, in volume 25, issue 5-8, pages 220-222

Published in Bollettino Malacologico, in 1989, in volume 25, issue 5-8, pages 257-260