L. Annaei Senecae ad Lucilium epistularum moralium : libri XIV-XX / Achilles Beltrami recensuit. - Seneca, Lucius Annaeus, 5/4 a.C.-65 d.C. (OLS)http://pul/name/4401; Beltrami, Achille, 1868-1944. (OLS)http://pul/name/15937; Seneca, Lucius Annaeus, 5/4 a.C.-65 d.C. Epistulae ad Lucilium. (OLS)http://pul/nameTitle/273 (OLS)http://pul/name/4401 (OLS)http://pul/title/132006 (in aedibus N. Zanichelli, 1927)