1. An Analysis of Utilizing Helicopter Logging in Turkish Forestry
2. Amad, WMSW and Kamaruzaman, MP. November 2003.Alternatives to reduced impact logging techniques in Peninsular Malaysia, November, 17–20. Kisarazu City, Japan: Paper presented at the International Expert Meeting on the Development and Implementation of National Codes of Practice for Forest Harvesting – Issues and Options.
3. Helicopter Logging Productivity on Harvesting Operations in Southeast Alaska, Using Ecologically Based Silvicultural Prescriptions