Quantum redactiones paginae "Annus quattuor imperatorum" differant

m (movit Annus Quattuor Imperatorum ad Annus quattuor imperatorum praeter redirectionem: norma)
* Bernard W. Henderson, ''Civil war and rebellion in the Roman Empire''. 1908
* Gwyn Morgan, ''69 A. D. The year of four emperors''. Oxonii: Oxford University Press, 2006. ISBN 978-0-19512468-2
* R. F. Newbold, "Vitellius and the Roman Plebs" in ''Historia'' vol. 21 (1972) pp. 308-319
* C. L. Murison, ''Galba, Otho and Vitellius: careers and controversies''. Hildesheim, 1993
* P. Schunk, "Studien zur Darstellung des Endes von Galba, Otho und Vitellius in den Historien des Tacitus" in ''Symbolae Osloenses'' vol. 39 (1964) pp. 38-82