AYDT - Schwermer,H.; Brulisauer,F.; De Koeijer,A.; Heim,D. - Evaluation of the effectiveness of selected measures against bovine spongiform encephalopathy (BSE) in Switzerland by use of the basic reproduction ratio R0 - Berliner und Münchener Tierärztliche Wochenschrift 2007 May-Jun; 120(5-6): 189-96
AXEW - Schwermer,H.; Forster,K.; Brulisauer,F.; Chaubert,C.; Heim,D. - BSE, feed and cattle in Switzerland: is there a spatial relation? - Veterinary Research 2007 May-Jun; 38(3): 409-18