1. American National Standard for Arboricultural Operations — Safety Requirements (Z133.1— 2017);ANSI (American National Standards Institute),2017
2. Minimum Industry Standards;Arboriculture Australia,2018
3. Standards Development.;ASSP (American Society of Safety Professionals),2020
4. Tree care industry: how accidents happen and why: arboricultural safety in the United States;Ball;Tree Care Industry,2003
5. A Survey of United States tree care companies: part I -safety training and fatal accidents;Ball;Arboric. Urban For.,2010