“Softwood sawlog secondary transport travel speed prediction for the South African forestry industry”
Occurring in Southern Forests: a Journal of Forest Science, Vol. 77(2), 2015. P Ackerman, R Pulkki and E Gleasure. Source: http://www.tandfonline.com/doi/abs/10.2989/20702620.2014.984150#.Vd31OSPovIU