2016DIN EN ISO 17831-1:2016-05 Solid biofuels - Determination of mechanical durability of pellets and briquettes - Part 1: Pellets (ISO 17831-1:2015); German version EN ISO 17831-1:2015
2016DIN EN ISO 17831-1:2016 Solid biofuels - Determination of mechanical durability of pellets and briquettes - Part 1: Pellets (ISO 17831-1:2015)