Pöykiö, R. , Dahl, O. , Nurmesniemi, H.. "Extractable Heavy Metal Concentrations in Bottom Ash from Incineration of Wood-Based Residues in a BFB Boiler Using Artificial Sweat and Gastric Fluids". World Academy of Science, Engineering and Technology, Open Science Index 67, International Journal of Biomedical and Biological Engineering (2012), 6(7), 354 - 357.