Excitation functions for proton-induced reactions on natural hafnium: Production of 177Lu for medical use - Siiskonen, T.; Huikari, J.; Haavisto, T.; Bergman, J.; Heselius, S.-J.; Lill, J.-O.; Lönnroth, T.; Peräjärvi, K.; Vartti, V.-P. (Nuclear Instruments & Methods in Physics Research Section B, 2009)