John W. Roberts, ур. (2007). „Pliny the Younger”. The Oxford Dictionary of the Classical World. Oxford: Oxford University Press. ISBN9780192801463. Приступљено 18. 7. 2019. „The tenth bk. of letters contains all of Pliny's correspondence with Trajan. [...] The provincial letters are the only such dossier surviving entire, and are a major source for understanding Roman provincial government.”
