Hundreds of research papers have been published on the Burgess Shale starting from 1886! A selection of references related to particular species is provided in the Fossil Gallery (bibliography section). (Download the free PDF version of other references related to the geology and taphonomy of the Burgess Shale here).
RIGBY, J.K., AND D. COLLINS. 2004. Sponges of the Middle Cambrian Burgess Shale and Stephen Formations, British Columbia, Royal Ontario Museum Contributions in Science 1, 155 pages. [To order please follow link.]