Shackleton Bailey, D. R. (Ed.). (1965). Cicero’s letters to Atticus Vol. 2 58 – 54 B.C.: 46 – 93 (books III and IV) (Vol. 2, Ser. Cabridge Classical Texts and Commentaries).
Shackleton Bailey, D. R. (2001). Cicero. Letters to friends (Vol. 1). Harvard University Press.
Mommsen, Th. (1894): Cassiodori Senatoris Variae, Monumenta Germaniae Historica – Auctores antiquissimi, vol. XII.
A research website about Archaeology of Ancient Roman Thermalism — and a meeting point for researchers and other people interested in this subject (Thermal Network).