1. Laboratory studies of the cutting of grass stems;O'Dogherty;Journal of Agricultural Engineering Research,1986
2. Equipment to measure the force and energy required to cut the stems of forage;Baker,1982
3. Principles of Farm Machinery;Kepner,1978
4. A review of research on forage chopping;O'Dogherty;Journal of Agricultural Engineering Research,1982
5. A review of research on forage chopping;O'Dogherty;National Institute of Agricultural Engineering, Report 37,1981