Horace, Sermones 2.16.19 and Odes 3.30.7; Verity Platt, Facing the Gods: Epiphany and Representation in Graeco-Roman Art, Literature (Cambridge University Press, 2011), p. 355. /wiki/Horace
New Larousse Encyclopedia of Mythology (Hamlyn, 1968), p. 209.
Varro, as preserved by Nonius, p. 64 (Müller); Cicero, De natura deorum 2.23; Dionysius Halicarnassus 4.15; Plutarch, Roman Questions 23. /wiki/Dionysius_Halicarnassus
Lawrence Richardson, A New Topographical Dictionary of Ancient Rome (Johns Hopkins University Press, 1992), p. 409.
These sites included the cult of Dea Febris, the goddess of fever; a shrine to the goddess Mefitis, associated with toxic gases emitted from the earth; and an altar of Mala Fortuna ("Bad Luck"); Paul F. Burke, "Malaria in the Graeco-Roman World," Aufstieg und Niedergang der römische Welt II.37.2 (1995), p. 2268. /wiki/Dea_Febris
Donald G. Kyle, Spectacles of Death in Ancient Rome (Routledge, 1998, 2001), p. 164.
Festus p. 322 in the edition of Lindsay; Richardson, Topographical Dictionary, p. 409. /wiki/Sextus_Pompeius_Festus
Dionysius Halicarnassus 4.15.5; Plutarch, Roman Questions 23; Richardson, Topographical Dictionary, p. 409; Kyle, Spectacles of Death, p. 166.
Suetonius, Life of Nero 39.1; Kyle, Spectacles of Death, p. 178. /wiki/Suetonius
Livy 40.19.4 and 41.21.6. /wiki/Livy
Horace, Epistulae 1.7.6f.; Seneca, De beneficiis 6.38.4; Jörg Rüpke, Religion of the Romans (Polity Press, 2007, originally published in German 2001), p. 235. /wiki/Seneca_the_Younger
Hendrik Wagenvoort, "The Origin of the Goddess Venus," in Pietas: Selected Studies in Roman Religion (Brill, 1980), p. 178; Daniel P. Harmon, "Religion in the Latin Elegists," Aufstieg und Niedergang der römischen Welt II.16.3 (1986), p. 1924. /wiki/Hendrik_Wagenvoort
Harmon, "Religion in the Latin Elegists," p. 1924, citing Paul Kretschmer, "Die protoindogermanische Schicht," Glotta 14 (1925), p. 307.
Varro, De lingua latina 6.47.
Harmon, "Religion in the Latin Elegists," p. 1924, citing Robert Schilling, La religion romaine de Vénus depuis les origines jusqu'au temps d'Auguste, Bibliothèque des Écoles d'Athènes et de Rome 178 (Paris, 1954).