Treatise Online, no. 24: Part E, Revised, Volume 4, Chapter 3: Introduction to Post-Devonian Hypercalcified Sponges (Stromatoporoid Type)
Treatise Online no. 58: Part E, Revised, Volume 4, Chapter 4A–B: Hypercalcified extant and fossil chaetetid-type and Post-Devonian stromatoporoid-type Demospongiae: Systematic descriptions.