(1)
Büchi, F. N.; Affolter, J.-F.; Camenzind, S.; Chmielewski, N.; Dietrich, P.; Höckel, M.; Ruge, M.; Santis, M. PEFC: Stacks, Systems, and Applications. Chimia 2004, 58 (12), 869. https://doi.org/10.2533/000942904777677074.