Dagys 1999. Evolution of the Family Sibiritidae and detailed biostratigraphy of the Siberian Upper Olenekian (Triassic). Advancing research on living and fossil cephalopods: development and evolution: form, construction, and function: taphonomy, palaeoecology, palaeobiogeography, biostratigraphy, and basin analysis., Kluwer Academic/Plenum Publishers, New York, Boston etc., 1999: i-xvi, 1-550. Chapter pagination: 109-123