Published in Zitteliana, in 1993, in volume 20, pages 213-221

Created: 2017-11-06, modified: 2017-11-06

Published in Novon, in 1998, in volume 8, pages 231-234

Created: 2011-01-28, modified: 2016-02-16

Published in Proceedings of the California Academy of Sciences, in 1966, in volume 33, pages 453-480

Created: 2011-06-28, modified: 2011-06-28