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Rickards, B, Rigby, S, Rickards, J and Swales, C (1998) 'Fluid dynamics of the graptolite rhabdosome recorded by laser doppler anemometry.' Palaeontology, 41 (4). pp. 737-752.
Rigby, S (1991) 'Feeding strategies in graptoloids.' Palaeontology, 34 (4). pp. 797-813.
Rigby, S (1993) 'Population analysis and orientation studies of graptoloids from the Middle Ordovician Utica Shale, Quebec.' Palaeontology, 36 (2). pp. 267-282.