<Li> Suetonius (Gaius Suetonius Tranquillus) (2003). The Twelve Caesars, with an introduction by Michael Grant (Robert Graves, Transl .), Rev. Ed., London, UK: Penguin Books (ISBN 0140449213), (6), accessed 18 April 2015 . </Li> <Li> Arnold Joseph Toynbee (2014). "Julius Caesar (Roman ruler): The first triumvirate and the conquest of Gaul," and "Julius Caesar (Roman ruler): Antecedents and outcome of the civil war of 49--45 BC," at Encyclopædia Britannica (online), (7) and BC, accessed 18 April 2015 . </Li>

Who was put to death by the 2nd triumvirate