"Productivity of multi-tree Cutting in thinnings and clear cuttings of young downy birch (Betula pubescens) dominated stands in the integrated harvesting of pulpwood and energy wood”
Occurring in Baltic Forestry, Vol. 22(1), 2016. The authors were J Laitila, P Niemsito and K Vaatainen. Source: http://www.balticforestry.mi.lt/bf/PDF_Articles/2016-22/e-Baltic%20Forestry%202016.1_116-131%20psl.pdf
"Cost analysis of transporting forest chips and forest industry by-products with large truck-trailers in Finland"
Occurring in Biomass and Bioenergy, Vol. 90, 2016. The authors were J Laitila, A Asikainen and T Ranta. Source: http://www.sciencedirect.com/science/article/pii/S0961953416301258