*[https://apps.ecology.wa.gov/publications/documents/2110023.pdf High Performance Soil Media Mixes<ref>Howie, D., and Lubliner, B. 2021. Guidance on using new high performance bioretention soil mixes. "Water Quality Program",
+
Washington State Department of Ecology. Olympia, Washington. May 2021 - Publication 21-10-023.</ref>]