Published in Biol Bull, in 1940, in volume 78, pages 428-436

Created: 2010-01-06, modified: 2011-06-21

Published in Biol Bull, in 1941, in volume 81, pages 105-113

Created: 2010-01-06, modified: 2011-06-21

Published in Biol Bull, in 1949, in volume 97, pages 138-144

Created: 2010-01-06, modified: 2011-06-21

Published in Historia naturalis bulgarica, in 1999, in volume 10, pages 133-146

Created: 2016-09-16, modified: 2016-09-16