1. Tree worker safety: which accidents occur in our industry;Ball;Arborist News,2004
2. Evaluation of Current Rigging and Dismantling Practices Used in Arboriculture;Detter,2008
3. The Art and Science of Practical Rigging;Donzelli,2001
4. Comparison of the frictional properties of several popular arborist blocks;Donzelli;J. Arboric.,1999
5. Drag coefficients and crown area estimation of red maple;Kane;Can. J. For. Res.,2006