==tham khảo==== nguồn tham khảo ==*information about the kugelblitz at panzerworld*information about the kugelblitz at achtung panzer*german tanks of world war ii the complete illustrated history of german armoured fighting vehicles 19261945 f m von senger und etterlin translated by j lucas galahad books new york 1969 isbn 0883650517* chamberlain peter & doyle hilary (1999) encyclopedia of german tanks of world war two