1. American National Standard for Tree Care Operations – Tree, Shrub and Other Wood Plant Maintenance – Standard Practices (Pruning);American National Standards Institute (ANSI A300 Part1),2001
2. Tree and wind: a practical consideration of the drag equation velocity exponent for urban tree risk management;Cullen;Journal of Arboriculture,2005
3. Green roofs; building energy savings and the potential for retrofit;Castleton;Energy and Building,2010
4. Green Roofs – Ecological Design and Construction;Earth Pledge Foundation,2004
5. Effects of pruning dose and type on trunk movement in tropical storm winds;Gilman;Arboriculture & Urban Forestry,2008