| Reference no. | Description | year | Name used | Page |
|---|---|---|---|---|
| 77920 | Liu, L. 1997 A primarily research on echinoderm in the watershed around Guangxi Islands. Journal of Guangxi Academy of Science 13(1):8-11. | 1997 | Phyrella fragilis | 10 |
| 485 | UNEP-WCMC 2003 UNEP-WCMC Species Database. http://www.unep-wcmc.org. | 2003 | Phyrella fragilis | --> |
| 833 | Ruppert, E.E., R.S. Fox and R.D. Barnes 2004 Invertebrate Zoology. A functional evolutionary approach. 7th Ed. Brooks/Cole, Thomson Learning learning, Inc. 990 p. | 2004 | Phyrella fragilis | --> |