This author has not been identified. Look up 'Renaud-Alexandre Pitaval' in GoogleThis author has not been identified. Look up 'Olav Tirkkonen' in GoogleThis author has not been identified. Look up 'Risto Wichman' in GoogleThis author has not been identified. Look up 'Kari Pajukoski' in GoogleThis author has not been identified. Look up 'Eeva Lähetkangas' in GoogleThis author has not been identified. Look up 'Esa Tiirola' in Google