1. Open nomenclature;Bengtson;Palaeontology,1988
2. The British Devonian Crinoidea. Part 1, introduction and Camerata;Donovan;Monograph of the Palaeontographical Society,2014
3. An enigmatic echinoid spine from south Devon, UK—Devonian or Cretaceous?;Donovan;Proceedings of the Yorkshire Geological Society,2017
4. Where have all the sponges gone? The significance of spicules from the Upper Pliocene Hopegate formation of Jamaica;Donovan;Caribbean Journal of Science,2007
5. Middle and Late Devonian sponge spicules of the Holy Cross Mountains and Silesian Upland;Hurcewicz;Acta Palaeontologica Polonica,1993