return {
 ["ackrillaristotle"] = {
  author = "{},{Ackrill},{},{J.~L.},{J.~L.}",
  category = "book",
  city = "Oxford",
  pubname = "Oxford UP",
  pubyear = "1981",
  tag = "ackrillaristotle",
  title = "Aristotle the Philosopher",
 },
 ["gibsonlearning"] = {
  arttitle = "Learning Greek History in the Ancient Classroom: the Evidence of the Treatises on Progymnasmata",
  category = "article",
  journal = "Classical Philology",
  pages = "103--129",
  pubyear = "2004",
  tag = "gibsonlearning",
  volume = "99",
 },
 ["intertestualita"] = {
  category = "book",
  city = "Amsterdam",
  pubname = "Hakkert",
  pubyear = "1995",
  tag = "intertestualita",
  title = "Atti del convegno internazionale \\quotation {Intertestualit{\\`a}}: il \\quotation {dialogo} fra testi nelle letterature classiche: Cagliari, 24--26 novembre 1994",
}