Kreienbrock, J. (2020). Passage on a ship of fools: Heine, Marx, and Ruge on the tragedy and farce of the German revolution. Heine-Jahrbuch.

Kreienbrock, Jörg. "Passage on a Ship of Fools: Heine, Marx, and Ruge on the Tragedy and Farce of the German Revolution." Heine-Jahrbuch 2020.

Kreienbrock, Jörg. "Passage on a Ship of Fools: Heine, Marx, and Ruge on the Tragedy and Farce of the German Revolution." Heine-Jahrbuch, 2020.