Bartel, Fritz (2021), Bartel, Fritz; Monteiro, Nuno P. (eds.), "Overcoming Stagnation", Before and After the Fall: World Politics and the End of the Cold War, Cambridge University Press, pp. 27–44, doi:10.1017/9781108910194.003, ISBN978-1-108-90677-7, S2CID244846930
Bartel, Fritz (2021), Bartel, Fritz; Monteiro, Nuno P. (eds.), "Overcoming Stagnation", Before and After the Fall: World Politics and the End of the Cold War, Cambridge University Press, pp. 27–44, doi:10.1017/9781108910194.003, ISBN978-1-108-90677-7, S2CID244846930