Niko S., Nishida T. (2003) Devonohelicoceras hidaense, a new torticonic oncocerid (Cephalopoda) from the Devonian of Central Japan. Proceedings of the Japan Academy, Series B, 79 (7), 201–6.

Nützel A., Lehnert O., Frýda J. (2007) Origin of planktotrophy – evidence from early molluscs: a response to Freeman and Lundelius. Evolution & Development, 9, 313–8.

Peel J. S. (1991) Functional morphology, evolution, and systematics of Early Palaeozoic univalved molluscs. Grønlands Geologiske Undersøgelse, № 161, 1–116.

Peel J. S. (2004) Asymmetry and musculature in some Carboniferous bellerophontiform gastropods (Mollusca). GFF, 126, 213–20.

Peterman D. J., Ciampaglio C. N., Shell R. C., Yacobucci M. M. (2019) Mode of life and hydrostatic stability of orthoconic ectocochleate cephalopods: Hydrodynamic analyses of restoring moments for 3D printed, neutrally buoyant models. Acta Palaeontologica Polonica, 64, 441–60.

Pojeta J., Jr., Runnegar B. (1976) The paleontology of rostroconch mollusks and the early history of the phylum Mollusca. United States Geological Survey Professional Paper, № 968, 1–88.

Ponder W. F., Parkhaev P. Yu., Beechey D. L. (2007) A remarkable similarity in scaly shell structure in Early Cambrian univalved limpets (Monoplacophora; Maikhanellidae) and a Recent fissurellid limpet (Gastropoda: Vetigastropoda) with a review of Maikhanellidae. Molluscan Research, 27, 153–63.

Porter S. M. (2008) Skeletal microstructure indicates chancelloriids and halkieriids are closely related. Palaeontology, 51, 865–79.

Radtke G., Keupp H. (2017) The dorsal shell wall structure of Mesozoic ammonoids. Acta Palaeontologica Polonica, 62, 59–96.

Roger T. D. K., Runnegar B., Matt K. (2020) Pelagiella exigua, an early Cambrian stem gastropod with chaetae: Lophotrochozoan heritage and conchiferan novelty. Palaeontology, 63, 601–27.