*[http://extension.oregonstate.edu/stormwater/experts-corner-green-infrastructure Oregon State University guide by GreenGirl (creative commons licensed)]
*[http://extension.oregonstate.edu/stormwater/experts-corner-green-infrastructure Oregon State University guide by GreenGirl (creative commons licensed)]
*[https://library.municode.com/la/central/codes/code_of_ordinances?nodeId=APXKST_STBM Municipal Code Central Louisiana]
*[https://library.municode.com/la/central/codes/code_of_ordinances?nodeId=APXKST_STBM Municipal Code Central Louisiana]