Thiers, M. Adolphe. History of the Consulate and the Empire of France under NapoleonIV. 由D. Forbes Campbell翻譯. Philadelphia: J. B. Lippincott & Co. 1864: 243 [2022-09-01]. （原始內容存檔於2020-04-06）. whilst it was almost impossible to drag the gun-carriages through the half-frozen mud (regarding November 20, 1812)
May, Timothy Michael (編). The Mongol Empire: A Historical Encyclopedia. Empires of the World 1. Santa Barbara, California: ABC-CLIO. 2016: 65 [21 August 2019]. ISBN 9781610693400. During the Mongol invasion of the Rus' principalities in 1238-1240, Novgorod escaped destruction by the Mongols due to an early spring, which transformed the routes to Novgorod into a muddy bog.
Overy, Richard. Russia's War. London: Penguin. 1997: 113–114. ISBN 1-57500-051-2. Both sides now struggled in the autumn mud. On October 6 [1941] the first snow had fallen, unusually early. It soon melted, turning the whole landscape into its habitual trackless state – the rasputitsa, literally the 『time without roads』.... It is commonplace to attribute the German failure to take Moscow to the sudden change in the weather. While it is certainly true that German progress slowed, it had already been slowing because of the fanatical resistance of Soviet forces and the problem of moving supplies over the long distances through occupied territory. The mud slowed the Soviet build-up also, and hampered the rapid deployment of men and machines.
Pinkus, Oscar. The War Aims and Strategies of Adolf Hitler. Jefferson, North Carolina: McFarland. 2005: 241 [21 August 2019]. ISBN 9780786420544. By the time the Germans approached their major objectives such as Rostov, Moscow, or Leningrad the campaigning season was over and Barbarossa was off his horse. [...] [Hitler] had not planned to fight in Russia during the fall and winter. He had stated in his Directive No. 21 that this was to be a 'lightning campaign' to be won in two to four months maximum. [...] the cause of failure was the proposition that the Soviet Union could and would be defeated in a blitzkrieg.
